Lenуuk M. P. and Shestоpal . A. F., “In bifurcated solution of the Cauchy problem for one class of parabolic systems ”, Ukr. Mat. Zhurn., vol. 23, no. 1, pp. 110–117, Dec. 1970, Accessed: Dec. 06, 2025. [Online]. Available: https://umj.imath.kiev.ua/index.php/umj/article/view/8491