Positronium-Like States in GaAs at Low Temperature Dekhtyar, I. Y. A. ; Adonkin, V. T. ; Likhtorovich, S. P. ; Rustamov, Sh. A. Abstract Publication: Physica Status Solidi B Basic Research Pub Date: July 1978 DOI: 10.1002/pssb.2220880157 Bibcode: 1978PSSBR..88...55D