\Bibitem{Ins99} \by A.~V.~Inshakov \paper Invariants of Types $j^+$, $j^-$, and $\operatorname{st}$ for Smooth Curves on Two-Dimensional Manifolds \jour Funktsional. Anal. i Prilozhen. \yr 1999 \vol 33 \issue 3 \pages 35--46 \mathnet{http://mi.mathnet.ru/faa364} \crossref{https://doi.org/10.4213/faa364} \mathscinet{http://mathscinet.ams.org/mathscinet-getitem?mr=1724268} \zmath{https://zbmath.org/?q=an:0957.57019} \transl \jour Funct. Anal. Appl. \yr 1999 \vol 33 \issue 3 \pages 189--198 \crossref{https://doi.org/10.1007/BF02465203} \isi{https://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcApp=Publons&SrcAuth=Publons_CEL&DestLinkType=FullRecord&DestApp=WOS_CPL&KeyUT=000084499000003}