Korhonen R. Meromorphic solutions of differential and difference equations with deficiencies : Diss. / R.Korhonen, 2002. - 91 p. - Текст : непосредственный.
Korhonen R. Model studies of the transfer of radionuclides in the Finnish environment : Diss. / R.Korhonen, 1991. - Pag.var. - Текст : непосредственный.