Martynyuk, A. A., and Y. A. Martynyuk-Chernienko. “Analysis of the Set of Trajectories of Fuzzy Equations of Perturbed Motion”. Ukrains’kyi Matematychnyi Zhurnal, Vol. 66, no. 11, Nov. 2014, pp. 1512–1527, https://umj.imath.kiev.ua/index.php/umj/article/view/2242.