A. I. Tret'yak, “Higher-order pointwise optimality conditions”, J Math Sci, 71, № 3, 1994, 2486
G. M. Sklyar, S. Y. Ignatovich, “Fliess series, a generalization of the Ree's theorem, and an algebraic approach to a homogeneous approximation problem”, International Journal of Control, 81, № 3, 2008, 371
Mauro Garavello, Benedetto Piccoli, “Hybrid Necessary Principle”, SIAM J. Control Optim., 43, № 5, 2005, 1867
A. Marigo, “Classification of Carnot Algebras: the Semi-Rigid Cases”, J Dyn Control Syst, 13, № 1, 2007, 95
Woocheol Choi, Raphaël Ponge, “Privileged Coordinates and Nilpotent Approximation for Carnot Manifolds, II. Carnot Coordinates”, J Dyn Control Syst, 25, № 4, 2019, 631
Eugénio M. Rocha, 281, Nonlinear and Adaptive Control, 2003, 317
A. A. Agrachev, “Any sub-Riemannian metric has points of smoothness”, Dokl. Math., 79, № 1, 2009, 45
S. A. Vakhrameev, “Morse theory and Lyusternik-Shnirelman theory in geometric control theory”, J Math Sci, 71, № 3, 1994, 2434
F. Monroy-Pérez, A. Anzaldo-Meneses, “The Step-2 Nilpotent (n, n(n + 1)/2) Sub-Riemannian Geometry”, J Dyn Control Syst, 12, № 2, 2006, 185
Salvatore Monaco, DorothÉe Normand-Cyrot, Claudia Califano, “From Chronological Calculus to Exponential Representations of Continuous and Discrete-Time Dynamics: A Lie-Algebraic Approach”, IEEE Trans. Automat. Contr., 52, № 12, 2007, 2227