V. Lakeyev, A., V. A. Rusanov, A. V. Daneev, and Yu. D. Aksenov. 2023. “ON REALIZATION OF THE SUPERPOSITION PRINCIPLE FOR A FINITE BUNDLE OF INTEGRAL CURVES OF A SECOND-ORDER BILINEAR DIFFERENTIAL SYSTEM”. Advances in Differential Equations and Control Processes 30 (2). https://ojs.acad-pub.com/index.php/ADECP/article/view/2410.