Zs. Kajcsos, L. Liszkay, G. Duplatre, K. Lázár, L. Lohonyai, L. Varga, P.M. Gordo, A.P. de Lima, C. Lopes de Gil, M.F. Ferreira Marques, D. Bosnar, S. Bosnar, C. Kosanovic, B. Subotic:
Competitive positron and positronium trapping in porous media
Rad. Phys. Chem. 76 (2007) 231 - 236.