\Bibitem{Vat86} \by V.~A.~Vatutin \paper Sufficient regularity conditions for Bellman--Harris branching processes \jour Teor. Veroyatnost. i Primenen. \yr 1986 \vol 31 \issue 1 \pages 59--66 \mathnet{http://mi.mathnet.ru/tvp1591} \mathscinet{http://mathscinet.ams.org/mathscinet-getitem?mr=836952} \zmath{https://zbmath.org/?q=an:0658.60115|0603.60078} \transl \jour Theory Probab. Appl. \yr 1987 \vol 31 \issue 1 \pages 50--57 \crossref{https://doi.org/10.1137/1131004} \isi{https://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcApp=Publons&SrcAuth=Publons_CEL&DestLinkType=FullRecord&DestApp=WOS_CPL&KeyUT=A1987G554300004}