2	3	DG.O	DG.O
6	7	SPAA	SPAA
8	10	Comput. J.	SIAM J. Comput.
14	15	Proceedings of the 25th Annual Symposium onFoundations of Computer Science, 1984	Proceedings of the 25th Annual Symposium onFoundations of Computer Science, 1984
16	17	Proceedings of the 31st Annual Symposium on Foundations of Computer Science	Proceedings of the 33rd Annual Symposium on Foundations of Computer Science
