Shavrina, A. V.; Glagolevskij, Y. V.; Silvester, J.; Chuntonov, G. A.; Pavlenko, Y. V.; Khalack, V. R. SPOTS STRUCTURE AND STRATIFICATION OF SOMECHEMICAL ELEMENTS IN THE ATMOSPHERE OF He-WEAK STAR HD 21699. Одес. астроном. публ. 2008, 21, 115-119.