A. D. Mazhitova, “The normal sub-Riemannian geodesic flow on $E(2)$ generated by a left-invariant metric and a right-invariant distribution”, Sibirsk. Mat. Zh., 55:5 (2014), 1160–1166; Siberian Math. J., 55:5 (2014), 948–953
A. D. Mazhitova, “The geodesic flow of a sub-Riemannian metric on a solvable lie group”, Mat. Tr., 15:1 (2012), 120–128; Siberian Adv. Math., 23:2 (2013), 99–105