1.
Rozenfeld BA, Ezhova-Guseva LM, Semenova TA. Metrical invariants and covariants of couples of planes in the flag space. LMJ [Internet]. 1964 Jun. 15 [cited 2024 Apr. 30];4(2):255-9. Available from: https://www.journals.vu.lt/LMJ/article/view/19505