Zorii, N.V. (2005) “Necessary and Sufficient Conditions for the Solvability of the Gauss Variational Problem”,
Ukrains’kyi Matematychnyi Zhurnal, 57(1), pp. 60–83. Available at:
https://umj.imath.kiev.ua/index.php/umj/article/view/3574 (Accessed: 10 April 2025).