\Bibitem{Gus24} \by A.~A.~Gushchin \paper Uniform integrability of nonnegative supermartingales via change of time in geometric Brownian motion \jour Teor. Veroyatnost. i Primenen. \yr 2024 \vol 69 \issue 4 \pages 780--790 \mathnet{http://mi.mathnet.ru/tvp5742} \crossref{https://doi.org/10.4213/tvp5742}