Bondarenko, V. M. and Stepochkina, M. V. (2008) “$(\min, \max)$-equivalence of posets and nonnegative Tits forms”, Ukrains’kyi Matematychnyi Zhurnal, 60(9), pp. 1157–1167. Available at: https://umj.imath.kiev.ua/index.php/umj/article/view/3234 (Accessed: 28March2024).