\Bibitem{Ast15} \by S.~V.~Astashkin \paper Martingale transforms of a~Rademacher sequence in symmetric spaces \jour Algebra i Analiz \yr 2015 \vol 27 \issue 2 \pages 20--41 \mathnet{http://mi.mathnet.ru/aa1424} \mathscinet{http://mathscinet.ams.org/mathscinet-getitem?mr=3444460} \elib{https://elibrary.ru/item.asp?id=24849874} \transl \jour St. Petersburg Math. J. \yr 2016 \vol 27 \issue 2 \pages 191--206 \crossref{https://doi.org/10.1090/spmj/1383} \isi{https://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcApp=Publons&SrcAuth=Publons_CEL&DestLinkType=FullRecord&DestApp=WOS_CPL&KeyUT=000374002600002} \scopus{https://www.scopus.com/record/display.url?origin=inward&eid=2-s2.0-84958233143}