Kulinich, G. L. 1997. “Qualitative Analysis of the Influence of Random Perturbations of ‘white-noise’ Type Applied Along the Vector of Phase Velocity on a Harmonic Oscillator With Friction”. Ukrains’kyi Matematychnyi Zhurnal 49 (1), 35–46. https://umj.imath.kiev.ua/index.php/umj/article/view/4985.