1. A. M. Alekseev and A. K. Sborovskii, Naval Vibration Dampers [in Russian], Sudpromgiz, Moscow (1962).
2. M. I. Feigin, Prikl. Matem. i Mekh.,31, No. 1, 154 (1967).
3. V. I. Babitskii and A. B. Kobrinskii, Izv. Akad. Nauk SSSR, Mekhanika i Mashinostroenie, No. 3, 81 (1962).
4. K. V. Frolov, Mashinovedenie, No. 3, 38 (1965).
5. L. V. Bespalov, Yu. I. Neimark, and M. I. Feigin, Izv. Akad. Nauk, Mekh. Tverd. Tela, No. 1, 151 (1966).