1.
Wróbel M. Lichawski-Matkowski-Miś theorem on locally defined operators for functions of several variables. Ann. Univ. Paedagog. Crac. Stud. Math. [Internet]. 2008 Nov. 8 [cited 2026 Oct. 31];7:15-22. Available from: https://studmath.uken.krakow.pl/article/view/13265