Nonholonomic Systems and Sub-Riemannian Geometry. - Ovidiu Calin; Der-Chen Chang; Stephen S.-T. Yau (Commun. Inf. Syst., 2010)

Global connectivity and optimization on an infinite step distribution. - Bader Al-Shamary; Ovidiu Calin; Der-Chen Chang (Adv. Appl. Math., 2013)

Poincaré's lemma on the Heisenberg group. - Ovidiu Calin; Der-Chen Chang; Jishan Hu (Adv. Appl. Math., 2014)

Optimal training for adversarial games. - Ovidiu Calin (Ann. Math. Artif. Intell., 2021)