\Bibitem{BorIbrLot01} \by I.~S.~Borisov, I.~A.~Ibragimov, V.~I.~Lotov, A.~A.~Mogul'skii, Yu.~V.~Prokhorov, S.~G.~Foss \paper Aleksandr Alekseevich Borovkov (on his 70th birthday) \jour Russian Math. Surveys \yr 2001 \vol 56 \issue 5 \pages 1009--1012 \mathnet{http://mi.mathnet.ru/eng/rm449} \crossref{https://doi.org/10.1070/RM2001v056n05ABEH000449} \mathscinet{http://mathscinet.ams.org/mathscinet-getitem?mr=1892571} \zmath{https://zbmath.org/?q=an:1052.01518} \adsnasa{https://adsabs.harvard.edu/cgi-bin/bib_query?2001RuMaS..56.1009B} \isi{https://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcApp=Publons&SrcAuth=Publons_CEL&DestLinkType=FullRecord&DestApp=WOS_CPL&KeyUT=000173791600013}