1. A. I. Golubev, Modern Seals of Rotating Shafts [in Russian], Mashgiz, Moscow (1963).
2. G. A. Golubev and G. M. Kukin, Seals of Rotating Shafts [in Russian], Nauka, Moscow (1966).
3. F. L. Yiditskii, Graphite Sealing Devices [in Russian], Sudpromgiz, Leningrad (1961).