5562 J. Appell: Review of the book "Positive linear systems" by 
Krasnoselskii/Lifshits/Sobolev. Jber. DMV 94 (1992), B 43-44.

21021 Roland Derndinger: Über das Spektrum positiver Generatoren.
Math. Zeitschr. 172 (1980), 281-293.

G. Frobenius: Über Matrizen aus nicht negativen Elementen.
Sber. Preuß. Akad. Wiss. Berlin (1912), 456-477.

21059 Heinz König: New version of the Daniell-Stone-Riesz representation
theorem. Positivity 12 (2008), 105-118.

M. Krasnoselskii: Positive solutions of operator equations.
Noordhofff 1964.

M. Krasnoselskii/Ye. Lifshits/A. Sobolev: Positive linear systems (the method 
of positive operators). Heldermann 1989, 354p. DM 88.
Rather interesting and very up to date.

21025 Heinrich Lotz: Über das Spektrum positiver Operatoren.
Math. Zeitschr. 108 (1968), 15-32.

Oskar Perron: Zur Theorie der Matrizen. Math. Ann. 64 (1907), 248-263.

21033 Gian-Carlo Rota: On the eigenvalues of positive operators.
Bull. AMS 67 (1961), 556-558.

21027 Helmut Schaefer: Some spectral properties of positive linear operators.
Pacific J. Math. 10 (1960), 1009-1019.

21026 Helmut Schaefer: Spektraleigenschaften positiver linearer Operatoren.
Math. Zeitschr. 82 (1963), 303-313.

Helmut Schaefer: Banach lattices and positive operators. Springer 1974.

21024 I. Singer: On the eigenvalues of positive operators.
Bull. AMS ... (1961), 556-558.

H. Wielandt: Unzerlegbare, nicht negative Matrizen.
Math. Zeitschr. 52 (1950), 642-648.