Sauermann U, Meyermann R, Schluesener HJ (Jan 1993). "Cloning of a novel TGF-beta related cytokine, the vgr, from rat brain: cloning of and comparison to homologous human cytokines". J Neurosci Res. 33 (1): 142–7. doi:10.1002/jnr.490330118. PMID1453478. S2CID35064968.
Sauermann U, Meyermann R, Schluesener HJ (Jan 1993). "Cloning of a novel TGF-beta related cytokine, the vgr, from rat brain: cloning of and comparison to homologous human cytokines". J Neurosci Res. 33 (1): 142–7. doi:10.1002/jnr.490330118. PMID1453478. S2CID35064968.
Sauermann U, Meyermann R, Schluesener HJ (Jan 1993). "Cloning of a novel TGF-beta related cytokine, the vgr, from rat brain: cloning of and comparison to homologous human cytokines". J Neurosci Res. 33 (1): 142–7. doi:10.1002/jnr.490330118. PMID1453478. S2CID35064968.