TY - CHAP T1 - A Theory of Class T2 - OOIS’96 UR - https://eprints.whiterose.ac.uk/id/eprint/200766 PY - 1997/12/06 AU - Simons AJH ED - Patel D ED - Sun Y ED - Patel S DO - DOI: 10.1007/978-1-4471-0973-0_4 PB - Springer London SN - 9783540761327 SP - 44 EP - 56 Y2 - 2025/11/29 ER -