00698naa#a2200205#i#450# EN\\bibl\24382 20240505205745.7 2223-4608 20190118b2019####ek#y0engy0150####ca RUS RU Engineering computation of fiber laser focusing system Journal article Bryansk Bryansk State Technical University 2019 3 с. Journal article local Инженерное дело. Техника в целом. Транспорт. 62 RUS Bogdanov Aleksandr Vladimirovich Vasiltsov Viktor Vladimirovich Golubenko Yuriy Vladimirovich bstu.editorum.ru