\Bibitem{Kat90} \by P.~I.~Katsylo \paper Stable rationality of the field of invariants of linear representations of the groups~$\mathrm{PSL}_6$ and~$\mathrm{PSL}_{12}$ \jour Mat. Zametki \yr 1990 \vol 48 \issue 2 \pages 49--52 \mathnet{http://mi.mathnet.ru/mzm3307} \mathscinet{http://mathscinet.ams.org/mathscinet-getitem?mr=1076933} \zmath{https://zbmath.org/?q=an:0729.14034} \transl \jour Math. Notes \yr 1990 \vol 48 \issue 2 \pages 751--753 \crossref{https://doi.org/10.1007/BF01262607} \isi{https://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcApp=Publons&SrcAuth=Publons_CEL&DestLinkType=FullRecord&DestApp=WOS_CPL&KeyUT=A1990FJ67800027}