\Bibitem{Pro91} \by Yu.~V.~Prokhorov \paper Estimation of the variation of generalized measures that arise in connection with the central limit theorem \jour Teor. Veroyatnost. i Primenen. \yr 1991 \vol 36 \issue 2 \pages 370--372 \mathnet{http://mi.mathnet.ru/tvp2840} \mathscinet{http://mathscinet.ams.org/mathscinet-getitem?mr=1119515} \zmath{https://zbmath.org/?q=an:0774.60030|0728.60022} \transl \jour Theory Probab. Appl. \yr 1991 \vol 36 \issue 2 \pages 388--390 \crossref{https://doi.org/10.1137/1136046} \isi{https://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcApp=Publons&SrcAuth=Publons_CEL&DestLinkType=FullRecord&DestApp=WOS_CPL&KeyUT=A1991JB57800021}