@article{RM_2021_76_5_a5,
     author = {M. I. Ronzhina and L. A. Manita and L. V. Lokutsievskiy},
     title = {Solutions of {a~Hamiltonian} system with two-dimensional control in a~neighbourhood of a~singular second-order extremal},
     journal = {Trudy Matematicheskogo Instituta imeni V.A. Steklova},
     pages = {936--938},
     publisher = {mathdoc},
     volume = {76},
     number = {5},
     year = {2021},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/RM_2021_76_5_a5/}
}