Potapova, M.G. & Winter, D.M. (2006). Use of nonparametric multiplicative regression for modeling diatom habitat: a case study of the three Geissleria species from North America. In: N. Ognjanova-Rumenova & K. Manoylov (eds.), Advances in Phycological Studies. Festschrift in Honour of Prof. Dobrina Temniskova-Topalova. Pensoft Publishers, St. Kliment Ohridski University Press, Sofia-Moscow, pp. 319-332