Wright, Tomlinson: "The ins and outs of the transmembrane 4 superfamily." in: Immunology today, Vol. 15, Issue 12, pp. 588-94, 1995 (PubMed).
Kaprielian, Cho, Hadjiargyrou et al.: "CD9, a major platelet cell surface glycoprotein, is a ROCA antigen and is expressed in the nervous system." in: The Journal of neuroscience : the official journal of the Society for Neuroscience, Vol. 15, Issue 1 Pt 2, pp. 562-73, 1995 (PubMed).
Jennings, Crossno, Fox et al.: "Platelet p24/CD9, a member of the tetraspanin family of proteins." in: Annals of the New York Academy of Sciences, Vol. 714, pp. 175-84, 1994 (PubMed).
Park, Yashiro, Tai et al.: "Differential involvement of a Fas-CPP32-like protease pathway in apoptosis of TCR/CD9-costimulated, naive T cells and TCR-restimulated, activated T cells." in: Journal of immunology (Baltimore, Md. : 1950), Vol. 160, Issue 12, pp. 5790-6, 1998 (PubMed).
Terada, Baracskay, Kinter et al.: "The tetraspanin protein, CD9, is expressed by progenitor cells committed to oligodendrogenesis and is linked to beta1 integrin, CD81, and Tspan-2." in: Glia, Vol. 40, Issue 3, pp. 350-9, 2002 (PubMed).
Claas, Wahl, Orlicky et al.: "The tetraspanin D6.1A and its molecular partners on rat carcinoma cells." in: The Biochemical journal, Vol. 389, Issue Pt 1, pp. 99-110, 2005 (PubMed).