For citations:

Gusev A.I., Gusev S.A., Milevsky A.S. Optimal Maintenance of DiscreteObjects on the Plane, in Space and in Given Boundaries of the Sphere. World of Transport and Transportation. 2019;17(2):26-43. https://doi.org/10.30932/1992-3252-2019-17-2-26-43