1. H. Satoh, Tribological characteristics of submersible bearings for vertical pumps—Part 1 friction coefficient and wear, DENGYO-SYA Mech. 18-2 (1994) pp. 11–18.
2. Y. Sekioka, Y. Yamamoto, T. Shimojima, T. Ohmori, Y. Yasui, Wear characteristics of submerged bearings in vertical pumps, DENGYO-SYA Mech. 21-1 (1997) 5–10.
3. Y. Sotoyama, S. Ishizuka, T. Hirata, T. Sekino, T. Ogawa, T. Kuronuma, H. Ninomiya, Z. Dai, T. Yamazaki, Development of a bearing wear detector for a canned motor pump, EBARA Technical Report, No. 188, Japan, 2000-7. pp. 34–39.
4. A. Ogata, T. Gotoh, Diagnostic technology on abnormalities in vertical shaft pumps, EBARA Technical Report, No. 142, Japan, 1989-1, pp. 31–40.
5. H. Satoh, T. Sugiya, K. Okada, and S. Yamada, Influence of submerged bearings for vertical pumps on vibration characteristics, Mech. Soc. Jpn. 60-578 (1994-10) pp. 1–5.