For citations:

Kalinin M.I., Lev K. Isaev L.K., Bulygin F.V. Dimensions of plane and solid angles and their units in the International System of Units (SI). Izmeritel`naya Tekhnika. 2020;(10):26-32. (In Russ.) https://doi.org/10.32446/0368-1025it.2020-10-26-32