PrishlyakO. O. “Topological Classification of <em class="a-Plus-plus">m</Em&gt;-Fields on Two- and Three-Dimensional Manifolds With Boundary”. Ukrains’kyi Matematychnyi Zhurnal 55, no. 6 (June 25, 2003): 799-805. Accessed November 24, 2024. https://umj.imath.kiev.ua/index.php/umj/article/view/3954.