\Bibitem{FomKol89} \by V.~T.~Fomenko, E.~M.~Kolegaeva \paper Extension of infinitesimal bendings of surfaces to analytic bendings under external constraints \jour Mat. Zametki \yr 1989 \vol 45 \issue 2 \pages 30--39 \mathnet{http://mi.mathnet.ru/mzm3448} \mathscinet{http://mathscinet.ams.org/mathscinet-getitem?mr=1002515} \zmath{https://zbmath.org/?q=an:0721.53006|0674.53002} \transl \jour Math. Notes \yr 1989 \vol 45 \issue 2 \pages 109--115 \crossref{https://doi.org/10.1007/BF01158054} \isi{https://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcApp=Publons&SrcAuth=Publons_CEL&DestLinkType=FullRecord&DestApp=WOS_CPL&KeyUT=A1989CA56700020}