Nikitina N. About the existence of a homoclinic trajectory with symmetry in the three-dimensional systems . Dopov. Nac. akad. nauk Ukr. [Internet]. 2014 Jul. 28 [cited 2026 Jul. 11];(7):68-75. Available from: https://nasu-periodicals.org.ua/index.php/dp/article/view/16584