MaksimenkoS. I. (1999) “Classification of<em class="a-plus-plus">m</em&gt;-functions on surfaces”, Ukrains’kyi Matematychnyi Zhurnal, 51(8), pp. 1129–1135. Available at: https://umj.imath.kiev.ua/index.php/umj/article/view/4706 (Accessed: 24November2024).