by Kramm, U., Kogarko, L.N., Kononova, V.A., Vartiainen, H.
Published in Lithos (01.04.1993)

by Portnoj, A.I, Portnaya, T.V, Kononova, V.A, Shagov, P.N., Belarus State Academy of Agriculture, Gorki (Belarus)
Published in Zootechnicheskaya Nauka Belarusi (Belarus) (2008)