Prishlyak OO. Topological Classification of <em class="a-plus-plus">m</em>-Fields on Two- and Three-Dimensional Manifolds with Boundary. Ukr. Mat. Zhurn. [Internet]. 2003Jun.25 [cited 2024Nov.24];55(6):799-05. Available from: https://umj.imath.kiev.ua/index.php/umj/article/view/3954