Salvador, James R.; Guo, Fu; Hogan, Tim; Kanatzidis, Mercouri G. (2003). "Zero thermal expansion in YbGaGe due to an electronic valence transition". Nature. 425 (6959): 702. Bibcode:2003Natur.425..702S. doi:10.1038/nature02011. PMID14562099.
Salvador, James R.; Guo, Fu; Hogan, Tim; Kanatzidis, Mercouri G. (2003). "Zero thermal expansion in YbGaGe due to an electronic valence transition". Nature. 425 (6959): 702. Bibcode:2003Natur.425..702S. doi:10.1038/nature02011. PMID14562099.
Salvador, James R.; Guo, Fu; Hogan, Tim; Kanatzidis, Mercouri G. (2003). "Zero thermal expansion in YbGaGe due to an electronic valence transition". Nature. 425 (6959): 702. Bibcode:2003Natur.425..702S. doi:10.1038/nature02011. PMID14562099.