H. Bennett/D. Lutzer (ed.): Topology and order structure.
Math. Centre Tracts 142 (1981).

Daniela Bertacchi/Camillo Costantini: Existence of selections and
disconnectedness properties for the hyperspace of an ultrametric space.
Top. Appl. 88 (1998), 179-197.

F. van der Blij/A. Monna: Models of space and time in elementary physics.
J. Math. Analysis Appl. 22 (1968), 537-545.

24246 Albert Cuoco: Visualizing the p-adic integers.
Am. Math. Monthly 98 (1991), 355-364.

R. L. Ellis: Topological vector spaces over non-archimedean fields.
PhD Thesis Duke Univ. 1966.

R. L. Ellis: A non-archimedean analogue of the Tietze-Uryson extension
theorem. Proc. Kon. Ned. Ak. Wet. A 70 (1967), 332-333.

Alain Escassut: Ultrametric Banach algebras.
World Scientific 2003, 290p. $54.

Miroslav Fiedler: Ultrametric sets in Euclidean point spaces.
Electr. J. Lin. Algebra 3 (1998), 23-30.

21855 J. de Groot: Non-archimedean metrics in topology.
Proc. AMS 7/5 (1956), 948-953.

Alain Guenoche: Order-distance associated with a hierarchy.
J. Classif. 14/1 (1997), 101-115.

Ulrich Heckmanns: On the topology of ultrametric spaces.
In P. Simon (ed.): Proc. 8th Prague top. symposium (1997), 149-156.

Ulrich Heckmanns: Aspects of ultrametric spaces.
Queen's Papers 109 (1998), 134p.

15053 Jan Holly: Pictures of ultrametric spaces, the p-adic numbers,
and valued fields. Am. Math. Monthly 108 (2001), 721-728.

26046 Bruce Hughes: Trees and ultrametric spaces - a categorical equivalence.
Adv. Math. 189 (2004), 148-191.

2194 M. Husek/Hans-Christian Reichel: Topological characterization of 
linearly uniformizable spaces. Top. appl. 15 (1983), 173-188. [3291]

26047 Zair Ibragimov: Möbius maps between ultrametric spaces are local similarities.
Ann. Acad. Sci. Fenn. Math. 37 (2012), 309-317.

3293 D. Kurepa: Sur l'ecart abstrait. 
Glasnik Mat. Fiz. 11 (1956), 105-133. [3291]

26048 Alex Lemin: On ultrametrization of general metric spaces.
Proc. AMS 131/3 (2002), 979-989.

Alex Lemin/Vladimir Lemin: On a universal ultrametric space.
Topology Appl. 103 (2000), 339-345.

A. Monna: Remarques sur les metriques non-archimediennes I-II.
Proc. Kon. Ned. Ak. Wet. 53 (1950), 625-637.

A. Monna: Niet-archimedische metrieken en natuurkunde.
Simon Stevin 39 (1965), 31-42.

A. Monna: Some problems in distance geometry.
Euclides 44 (1968/69), 163-174.

A. Monna: Analyse non-archimedienne. Springer 1970.

21547 Fionn Murtagh: On ultrametricity, data coding, and computation.
Internet 2004, 23p.

21548 Fionn Murtagh: Thinking ultrametrically. Internet ca. 2005, 13p.

Peter Nyikos: Some surprising base properties in topology.
In Stavrakas/Allen 1975, 427-450.

Peter Nyikos: Order-theoretic base axioms. In Reed 1980, 367-398.

Peter Nyikos/Hans-Christian Reichel: On the structure of zerodimensional
spaces. Indag. Math. 37 (1975), 120-136.

Peter Nyikos/Hans-Christian Reichel: Uniforme Raeume mit einer geordneten
Basis. Monatshefte Math. ... (ca. 1975), ...

Sibylla Priess-Crampe/Paolo Ribenboim: Equivalence relations and spherically
complete ultrametric spaces. C.R. Ac. Sci. Paris 320/10 (1995), 1187-1192.

Sibylla Priess-Crampe/Paolo Ribenboim: Generalized ultrametric spaces I-II.
Abh. Math. Sem. Hamburg 66 (1996), 55-73, 67 (1997), 19-31.

Sibylla Priess-Crampe/Paulo Ribenboim: Ultrametric spaces and logic
programming. J. Logic Programm. 42/2 (2000), 59-70.

Sibylla Priess-Crampe/Paolo Ribenboim: Fixed point and attractor theorems
for ultrametric spaces. Forum Math. 12/1 (2000), 53-64.

2190 S. Purisch: The orderability of non-archimedean spaces.
Top. appl. 16 (1983), 273-277.

S. Purisch/E. Wattel: Non-orderability of suborderable spaces with many
pseudogaps. In Bennett/Lutzer 1981, 17-25.

26043 R. Rammal/G. Toulouse/M. Virasoro: Ultrametricity for physicists.
Rev. Modern Physics 58/3 (1986), 765-788.

G. Rangan: Non-archimedean valued almost periodic functions.
Proc. Kon. Ned. Ak. Wet. 72 (1969), 345-353.

G. Rangan: Non-archimedean Bohr compactification of a topological group.
Proc. Kon. Ned. Ak. Wet. 72 (1969), 354-359.

G. Reed (ed.): Surveys in general topology. Academic Press 1980.

Hans-Christian Reichel: Ueber nicht-archimedische Topologien.
Sber. Oest. Ak. Wiss. 178 (1970), 299-319.

Hans-Christian Reichel: On the metrization of the natural topology
on the space A^B. J. Math. Analysis Appl. ... (ca. 1971), ...

3292 Hans-Christian Reichel: Nearness and metrization.
... [3291]

Hans-Christian Reichel: Basic properties of topologies compatible with
(not necessarily symmetric) distance functions.
Gen. Top. Appl. 8 (1978), 283-289.

Hans-Christian Reichel: Towards a unified theory of semimetric and metric
spaces. Top. Structures II, Proc. Symp. Amsterdam 1978, Part 2,
Math. Centre Tracts 116 (1979), 209-241.

Hans-Christian Reichel: Ueber eine Klasse stark nulldimensionaler Raeume.
Topology and measure III, Proc. Conf. Vitte/Hiddensee 1980, Part 2,
(1982), 209-221. A well-written survey on some aspects of non-archimedean
topology.

26044 Paolo Ribenboim: The new theory of ultrametric spaces.
Period. Math. Hung. 32 (1996), 103-111.

A. van Rooy: Non-archimedean uniformities. Kyungpook Math. J. 10 (1970), 21-30.

A. van Rooy/W. Schikhof: Non archimedean analysis.
Niew Arch. Wiskunde 19 (1971), 120-150.

8332 J. Rutten: Elements of generalized ultrametric domain theory.
CWI Report CS-R9507 (1995), 31p.

N. Stavrakas/K. Allen (ed.): Studies in topology. Academic Press 1975.

2188 J. van Tiel: Spazi lineari topologici su un corpo a valutazione non
archimedea. Ricerche Mat. Napoli 19 (1970), 111-130. [3291]

10088 Stephen Watson: The classification of metrics and multivariate
statistical analysis. Internet ca. 1996, 27p.