Andriichuk V. I. 1992. “About the Teyt-Shafarevich Product in Elliptical Curves over Pseudolocal Fields With Remainder Fields of the Characteristics 3 ”. Ukrains’kyi Matematychnyi Zhurnal 44 (9), 1157-65. https://umj.imath.kiev.ua/index.php/umj/article/view/8163.