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শিকাগো স্টাইল (17 তম সংস্করণ) উদ্ধৃতিBologna APTEX International Conference Bologna, Italy, Inc ebrary, S. Graffi, এবং André Martinez. Long Time Behaviour of Classical and Quantum Systems: Proceedings of the Bologna APTEX International Conference : Bologna, Italy, 13-17 September 1999. Singapore ; River Edge, N.J.: World Scientific, 2001.
M.L.A (9 ম সংস্করণ) উদ্ধৃতিBologna APTEX International Conference Bologna, Italy, et al. Long Time Behaviour of Classical and Quantum Systems: Proceedings of the Bologna APTEX International Conference : Bologna, Italy, 13-17 September 1999. World Scientific, 2001.