(NtRIGONOMETRIQ (B/s - (NkOVEUROW(B, (NpAWEL qKOWLEWI^s ((NmOSKWA (B:s (NfIZMATGIZ(B,s, 1959)
Keywords: (NtRIGONOMETRIQs -- (Nu^EBNIKI I POSOBIQs