@article{TM_2021_314_a2,
     author = {Pablo Candela and Carlos Catal\'a and Juanjo Ru\'e and Oriol Serra},
     title = {On {Motzkin's} {Problem} in the {Circle} {Group}},
     journal = {Trudy Matematicheskogo Instituta imeni V.A. Steklova},
     pages = {49--70},
     publisher = {mathdoc},
     volume = {314},
     year = {2021},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/TM_2021_314_a2/}
}