Astrauskienė , E., Irena Tiknevičienė, and Liutauras Ragulskis. “Self-Regulation in Nonlinear Dinamic System With Inertial Excitation ”. Lietuvos matematikos rinkinys 38, no. II (December 14, 1998): 420–422 . Accessed November 26, 2025. https://www.zurnalai.vu.lt/LMR/article/view/37947.