Reference Books on Acoustics (Spravochnik po akustike) by V.K. Iofe, V.G. Korol’kov, M.A. Sapozhkov; Acoustical Systems forHome Use (Bytovye akusticheskie sistemy) by V.K. Iofe and M.V. Lizunkov; Electroacoustics. A Handbook for Technical Universities (Elektroakustika.Uchebnik dlia vusov) by M.A. Sapozhkov