Ruiz-Velasco V، Ikeda SR، Puhl HL (فبراير 2002). "Cloning, tissue distribution, and functional expression of the human G protein beta 4-subunit". Physiol Genomics. ج. 8 ع. 1: 41–50. DOI:10.1152/physiolgenomics.00085.2001. PMID:11842130.
Ruiz-Velasco V، Ikeda SR، Puhl HL (فبراير 2002). "Cloning, tissue distribution, and functional expression of the human G protein beta 4-subunit". Physiol Genomics. ج. 8 ع. 1: 41–50. DOI:10.1152/physiolgenomics.00085.2001. PMID:11842130.