Малицька ГП, Буртняк ІВ. STRUCTURE OF THE FUNDAMENTAL SOLUTION OF CAUCHY PROBLEM FOR KOLMOGOROV SYSTEMS OF SECOND-ORDER. Number [Internet]. 2019 Feb. 26 [cited 2025 Dec. 6];(1(29):60-71. Available from: https://pvntsh.nung.edu.ua/index.php/number/article/view/140