Kostin, Georgy. “Verified Solution to Optimal Control Problems of Elastic Rod Motion Based on the Ritz Method”. Acta Cybernetica 24, no. 3 (March 16, 2020): 393-408. Accessed April 24, 2024. https://cyber.bibl.u-szeged.hu/index.php/actcybern/article/view/4038.