positronium
1954 / Positronium / S. DeBenedetti ; H. C. Corben / Annual Review of Nuclear and Particle Science 4 (1954) p. 191 [doi]
1980 / Positronium / Stephan Berko ; Hugh N. Pendleton / Annual Review of Nuclear and Particle Science 30 (1980) p. 543 [doi]
1981 / Recent experimental advances in positronium research / Arthur Rich / Reviews of Modern Physics 53 (1981) p. 127 [doi]
1992 / [New Problems] Galactic positronium / Marvin Leventhal / American Journal of Physics 60 (1992) p. 856 [doi]
1999 / Positronium in the undergraduate laboratory / M. Yuly / American Journal of Physics 67 (1999) p. 880 [doi]
2006 / [Search and Discovery] Densely Packed Positronium Atoms Interact Chemically / Steven K. Blau / Physics Today 59 (2006) p. 23 [doi]