2 citations to https://www.mathnet.ru/eng/vuu774

1. E. Yu. Grazhdantseva, “O tochnom reshenii odnoi giperbolicheskoi sistemy differentsialnykh uravnenii”, Differentsialnye uravneniya i optimalnoe upravlenie, Itogi nauki i tekhn. Sovrem. mat. i ee pril. Temat. obz., 224, VINITI RAN, M., 2023, 35–42    
2. A. E. Imanchiyev, A. T. Assanova, A. Molybaikyzy, “Properties of a Nonlocal Problem for Hyperbolic Equations with Impulse Discrete Memory”, Lobachevskii J Math, 44:10 (2023), 4299