Petrauskas, Kostas Ramutis, Ignas Skučas, Irena Petrauskienė, and Antanas Būda. “Solution of Riccati Equation”.
Lietuvos matematikos rinkinys 42, no. spec. (December 20, 2002): 194–201. Accessed April 7, 2025.
https://www.journals.vu.lt/LMR/article/view/32880.