00711naa#a2200157#i#4500001001500000005001700015100004100032102000700073200012600080210013700206215001000343608003700353675012500390700002000515856001800535EN\\bibl\1904320260122004044.4##a20251230b2025####ek#y0engy0150####ca##aRU1#aGEOMETRIC METHOD FOR ANALYZING THE EXISTENCE OF A PERIODIC SOLUTION TO A DIFFERENTIAL EQUATIONeConference article/thesis1#aVoronezhcFSBE Institution of Higher Education Voronezh State University of Forestry and Technologies named after G.F. Morozovd2025##a5 с.##aConference article/thesis2local##aЛинейные обыкновенные дифференциальные уравнения и системы. 517.926#1aKorotkihgA. S.4#abibl.vgltu.ru