\Bibitem{ZhiTok24} \by M.~V.~Zhitlukhin, A.~A.~Tokaeva \paper Martingale methods in problems of existence of survival strategies \jour Teor. Veroyatnost. i Primenen. \yr 2024 \vol 69 \issue 4 \pages 653--667 \mathnet{http://mi.mathnet.ru/tvp5740} \crossref{https://doi.org/10.4213/tvp5740}