Storozh, O.G. and Oliiar, I.I. (2014) “On a criterion of mutual adjointness for extensions of some nondensely defined operators”, Methods of Functional Analysis and Topology, 20(1), pp. 50–58. Available at: https://zen.imath.kiev.ua/index.php/mfat/article/view/566 (Accessed: 18 December 2025).