Those were the days... I bought the printed book, for 1.0 or 1.1. Now there's an update for Tiger, and there's still some interesting stuff in it (e.g. self defined Collection classes etc.).
This list provides a quick overview of the landscape of open-source bibliographic software; both where is has been, but more importantly, where it may yet go.
K. Petersen, R. Feldt, S. Mujtaba, und M. Mattsson. Proceedings of the 12th International Conference on Evaluation and Assessment in Software Engineering, Seite 68--77. Swindon, UK, BCS Learning & Development Ltd., (2008)
F. Solms. Proceedings of the South African Institute for Computer Scientists and Information Technologists Conference, Seite 363--373. New York, NY, USA, ACM, (2012)
L. Zhu, M. Staples, und V. Tosic. 12th International IEEE Enterprise Distributed Object Computing Conference, 2008. EDOC '08, Seite 24--30. IEEE, (September 2008)
S. Angelov, P. Grefen, und D. Greefhorst. Joint Working IEEE/IFIP Conference on Software Architecture, 2009 & European Conference on Software Architecture. WICSA/ECSA 2009, Seite 141--150. IEEE, (September 2009)