USHIR: A Knowledge-Based Hypermedia System - Nicolson, Roderick I. and Tomlinson, Philip (Hypermedia, 1991)
https://katalog.adlr.link/Record/ai-49-aHR0cDovL2R4LmRvaS5vcmcvMTAuMTA4MC8wOTU1ODU0My4xOTkxLjEyMDMxMTg4