1. R.M. Lambrecht: “Antimatter-Matter Interactions, 1. Positron and Positronium,a Bibliography 1930’1974”; Tech. Rpt. BNL 50510, Brookhaven National Laboratory (1975)
2. À.T. Śtewart, L.O. Roellig (eds.): Positron Annihilation (Academic Press, New York 1967)
3. Proc. of 2nd Ínt. Conf. on Positron Annihilation, Kingston, Ontario 1971 (unpublished)
4. P. Hautojärvi, A. Seeger (eds.): Proc. of 3rd Int. Conf. on Positron Annihilation, Offprints from Appl. Phys. 3’5
5. Proc. of 4th Int. Conf. on Positron Annihilation, Helsingør, Denmark 1976 (unpublished)