1. CVI.A molecular theory of friction
2. H. Masumoto, K. Sugino, H. Hayashida, in: Proceedings of the Conference on First International Heavy Haul Railway, IHHA, Session 212, Colorado Springs, 1978.
3. K. Sugino, H. Kageyama, H. Masumoto, in: Proceedings of the Conference on Second International Heavy Haul Railway, IHHA, Perth, 1982, pp. 187–197.
4. K. Sugino, H. Kageyama, C. Urashima, in: Proceedings of the 32nd Mechanical Working and Steel, ISS, Warrendale, 1990, 171–176.