\Bibitem{GelGra80} \by I.~M.~Gel'fand, M.~I.~Graev \paper Admissible $n$-dimensional complexes of curves in $\mathbb{R}^n$ \jour Funktsional. Anal. i Prilozhen. \yr 1980 \vol 14 \issue 4 \pages 36--44 \mathnet{http://mi.mathnet.ru/faa1851} \mathscinet{http://mathscinet.ams.org/mathscinet-getitem?mr=595727} \zmath{https://zbmath.org/?q=an:0454.53042} \transl \jour Funct. Anal. Appl. \yr 1980 \vol 14 \issue 4 \pages 274--281 \crossref{https://doi.org/10.1007/BF01078303} \isi{https://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcApp=Publons&SrcAuth=Publons_CEL&DestLinkType=FullRecord&DestApp=WOS_CPL&KeyUT=A1980LX98800005}