The measure of non-compactness and approximation numbers of certain Volterra integral operators. D.E. Edmunds; V.D. Stepanov — 1994 Mathematische Annalen
Weighted estimates for the integral operators with monotone kernel on a half-axis. Stepanov, V.D.; Ushakova, E.P. — 2004 Sibirskij Matematicheskij Zhurnal
On boundedness of a certain class of Hardy-Steklov type operators in Lebesgue spaces. Stepanov, V.D.; Ushakova, E.P. — 2010 Banach Journal of Mathematical Analysis [electronic only]
The method of fictitious domains in the Signorini problem. Stepanov, V.D.; Khludnev, A.M. — 2003 Sibirskij Matematicheskij Zhurnal