@article{BASM_2023_1_a2, author = {Tatjana Petek and Valery G. Romanovski}, title = {Time-reversibility and ivariants of some $3$-dim systems}, journal = {Buletinul Academiei de \c{S}tiin\c{t}e a Republicii Moldova. Matematica}, pages = {16--28}, publisher = {mathdoc}, number = {1}, year = {2023}, language = {en}, url = {http://geodesic.mathdoc.fr/item/BASM_2023_1_a2/} }