Citation: Kotovskaya, L.D.; Chaban, N.F.; Kuz'ma, Yu.B. (1980). The new borides of the rare earth metals with the structure of the type W2 Cr21 C6. Dopovidi Akademii Nauk Ukrains'koi RSR, Seriya A: Fiziko-Matematichni Ta Tekhnichni Nauki, 42, pp. 87-89.