Burtnyak I, Malytska H. Fundamental matrix of solutions for one class of parabolic degenerate systems. Carpathian Math. Publ. [Internet]. 2012 Jun. 28 [cited 2024 Nov. 21];4(1):12–22. Available from: https://vps.pnu.edu.ua/index.php/cmp/article/view/2396