LYAPUNOV STABILITY OF SCALAR CHARGED SOLITONS Article Kumar A., Nisichenko V.P., Rybakov Yu.P. Soviet Physics Journal. Kluwer Academic Publishers-Plenum Publishers. Vol. 24. 1981. P. 53-56
SURGICAL METHOD USED FOR CORRECTION OF MITRAL RESTENOSIS WITH AN ELASTIC DILATOR Article Lapkin K.V., Chernov V.A., Dubrovsky V.S. Grudnaya Khirurgiya. Vol. 23. 1981. P. 11-16