Emets, O. A., S. I. Nedobachii, and Roskladka О. V. 2003. “Irreducible System of Constraints for a General Polyhedron of Arrangements”.
Ukrains’kyi Matematychnyi Zhurnal
55 (1): 3-11.
https://umj.imath.kiev.ua/index.php/umj/article/view/3882
.