\Bibitem{Ser10} \by A.~G.~Sergeev \paper Harmonic spheres conjecture \jour TMF \yr 2010 \vol 164 \issue 3 \pages 368--379 \mathnet{http://mi.mathnet.ru/tmf6546} \crossref{https://doi.org/10.4213/tmf6546} \adsnasa{https://adsabs.harvard.edu/cgi-bin/bib_query?2010TMP...164.1140S} \transl \jour Theoret. and Math. Phys. \yr 2010 \vol 164 \issue 3 \pages 1140--1150 \crossref{https://doi.org/10.1007/s11232-010-0092-5} \isi{https://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcApp=Publons&SrcAuth=Publons_CEL&DestLinkType=FullRecord&DestApp=WOS_CPL&KeyUT=000282695500005} \scopus{https://www.scopus.com/record/display.url?origin=inward&eid=2-s2.0-77958006395}