A. Hyvärinen, J. Hurri, and J. Väyrynen. Journal of the Optical Society of America A, 20 (7):
1237--1252(2003)Reprinted in Virtual Journal of Biological Physics Research, 6(2), 2003.
T. Honkela, A. Hyvärinen, and J. Väyrynen. A72. Helsinki University of Technology, Laboratory of Computer and Information Science, Espoo, Finland, (2003)
A. Hyvärinen, J. Hurri, and J. Väyrynen. Journal of the Optical Society of America A, 20 (7):
1237--1252(2003)Reprinted in Virtual Journal of Biological Physics Research, 6(2), 2003.