\Bibitem{Pug68} \by Ch.~C.~Pugh \paper The closing lemma \jour Matematika \yr 1968 \vol 12 \issue 6 \pages 80--135 \mathnet{http://mi.mathnet.ru/mat490} \mathscinet{https://mathscinet.ams.org/mathscinet-getitem?mr=0226669} \zmath{https://zbmath.org/?q=an:0167.21803} \transl \jour Amer. J. Math. \yr 1967 \vol 89 \pages 956--1009