Massimo Ferri/S. Lombardini/C. Pallotti: Leukocyte classification by size functions. Proc. 2nd IEEE Workshop Appl. Computer Vision 1994, 223-229. Patrizio Frosini: A distance for similarity classes of submanifolds of a Euclidean space. Bull. Austr. Math. Soc. 42 (1990), 407-416. Patrizio Frosini: Discrete computation of size functions. J. Comb. Inf. Syst. Sci. 17 (1992), 232-250. Patrizio Frosini: Measuring shapes by size functions. Proc. SPIE Intell. Robots and Computer Vision X, Algorithms and Techniques, Boston, 1991, 122-133. Patrizio Frosini: Connections between size functions and critical points. Math. Meth. Appl. Sci. 19 (1996), 555-569. Patrizio Frosini/Massimo Ferri: Range size functions. Proc. SPIE Workshop Vision Geometry III 1994, 243-251. V. Leavers: Shape detection in computer vision using the Hough transform. Springer 1992. J. Mundy/A. Zisserman/D. Forsyth (ed.): Applications of invariance in computer vision. Springer LN CS 825 (1994). Y. Toet/D. Foster/Henk Heijmans/P. Meer (ed.): Shape in picture. Springer 1994. C. Uras/A. Verri: Studying shape through size functions. In Toet/Foster/Heijmans/Meer 1994, 81-90. C. Uras/A. Verri: On the recognition of the alphabet of the sign language through size functions. Proc. 12th IAPR Int. Conf. Pattern Recognition Jerusalem 1994, 334-338. A. Verri/C. Uras: Invariant size functions. In Mundy/Zisserman/Forsyth 1994, 215-234. A. Verri/C. Uras: Metric-topological approach to shape representation and recognition. Image Vision Comp. 14 (1996), 189-207. A. Verri/C. Uras: Computing size functions from edge maps. Int. J. Computer Vision ... (ca. 1997), ... A. Verri/C. Uras/Patrizio Frosini/Massimo Ferri: On the use of size functions for shape analysis. Biol. Cyb. 70 (1993), 99-107.