Kachanovskii, N. A., and V. A. Tesko. 2009. “Stochastic Integral of Hitsuda–Skorokhod Type on the Extended Fock Space”. Ukrains’kyi Matematychnyi Zhurnal 61 (6), 733-64. https://umj.imath.kiev.ua/index.php/umj/article/view/3056.