On bicompacta in Σ -products and related spaces N. N. Yakovlev — 1980 Commentationes Mathematicae Universitatis Carolinae
Свойства подпространста Σ -произведений, определяемые с помощью покрытий N. N. Yakovlev — 1984 Commentationes Mathematicae Universitatis Carolinae
O бикoмпaктax, лeжaщиx в σ -пpoизвeдeнияx L. V. Nakhmanson; N. N. Yakovlev — 1981 Commentationes Mathematicae Universitatis Carolinae
On bicompacta which are unions of spaces defined by means of coverings Evgenij G. Pytkeev; N. N. Yakovlev — 1980 Commentationes Mathematicae Universitatis Carolinae