Davron Kulturayev Jurayevich, and Bakhriddin Oltiyev Jurayevich. “RESULTS OF THE MINIMAX PRINCIPLE FOR SELF-ADJOINT OPERATORS IN THE FRIEDRICHS MODEL”. INTERNATIONAL JOURNAL OF SOCIAL SCIENCE & INTERDISCIPLINARY RESEARCH ISSN: 2277-3630 Impact factor: 8.036 13, no. 04 (April 30, 2024): 45–54. Accessed December 28, 2024. https://gejournal.net/index.php/IJSSIR/article/view/2388.