\Bibitem{Gla25} \by N.~Glagoleff \paper Geodetical representation of the $n$-dimension diversities on the plane space \jour Sb. Math. \yr 1925 \vol 32 \issue 2 \mathnet{http://mi.mathnet.ru/eng/sm7333} \zmath{https://zbmath.org/?q=an:51.0568.01}