@article{CHFMJ_2019_4_4_a3, author = {G. G. Mikhailichenko and A. A. Simonov}, title = {Coordinate-free recording }, journal = {\v{C}el\^abinskij fiziko-matemati\v{c}eskij \v{z}urnal}, pages = {412--418}, publisher = {mathdoc}, volume = {4}, number = {4}, year = {2019}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/CHFMJ_2019_4_4_a3/} }