\Bibitem{Pal09} \by V.~V.~Palin \paper Solvability of matrix Riccati equations \serial Tr. Semim. im. I.~G.~Petrovskogo \yr 2009 \vol 27 \pages 276--295 \mathnet{http://mi.mathnet.ru/tsp35} \mathscinet{http://mathscinet.ams.org/mathscinet-getitem?mr=2882746} \zmath{https://zbmath.org/?q=an:1182.15009} \elib{https://elibrary.ru/item.asp?id=15299175} \transl \jour J. Math. Sci. (N. Y.) \yr 2009 \vol 163 \issue 2 \pages 176--187 \crossref{https://doi.org/10.1007/s10958-009-9664-z} \scopus{https://www.scopus.com/record/display.url?origin=inward&eid=2-s2.0-70350707478}