^"Human PubMed Reference:".National Center for Biotechnology Information, U.S. National Library of Medicine.
^"Mouse PubMed Reference:".National Center for Biotechnology Information, U.S. National Library of Medicine.
^Makoff A, Lelchuk R, Oxer M, Harrington K, Emson P (April 1996). "Molecular characterization and localization of human metabotropic glutamate receptor type 4".Brain Research. Molecular Brain Research.37 (1–2):239–248.doi:10.1016/0169-328X(95)00321-I.PMID8738157.
^Wu S, Wright RA, Rockey PK, Burgett SG, Arnold JS, Rosteck PR, et al. (January 1998). "Group III human metabotropic glutamate receptors 4, 7 and 8: molecular cloning, functional expression, and comparison of pharmacological properties in RGT cells".Brain Research. Molecular Brain Research.53 (1–2):88–97.doi:10.1016/S0169-328X(97)00277-5.PMID9473604.
^Chaudhari N, Landin AM, Roper SD (February 2000). "A metabotropic glutamate receptor variant functions as a taste receptor".Nature Neuroscience.3 (2):113–119.doi:10.1038/72053.PMID10649565.S2CID16650588.
^Fazio F, Lionetto L, Molinaro G, Bertrand HO, Acher F, Ngomba RT, et al. (May 2012). "Cinnabarinic acid, an endogenous metabolite of the kynurenine pathway, activates type 4 metabotropic glutamate receptors".Molecular Pharmacology.81 (5):643–656.doi:10.1124/mol.111.074765.PMID22311707.S2CID6735807.
^Wierońska JM, Stachowicz K, Pałucha-Poniewiera A, Acher F, Brański P, Pilc A (December 2010). "Metabotropic glutamate receptor 4 novel agonist LSP1-2111 with anxiolytic, but not antidepressant-like activity, mediated by serotonergic and GABAergic systems".Neuropharmacology.59 (7–8):627–634.doi:10.1016/j.neuropharm.2010.08.008.PMID20713068.S2CID5171741.
^Hong SP, Liu KG, Ma G, Sabio M, Uberti MA, Bacolod MD, et al. (July 2011). "Tricyclic thiazolopyrazole derivatives as metabotropic glutamate receptor 4 positive allosteric modulators".Journal of Medicinal Chemistry.54 (14):5070–5081.doi:10.1021/jm200290z.PMID21688779.
^Hopkins CR, Niswender CM, Lewis LM, Weaver CD, Lindsley CW (2010). "Discovery of a potent, selective and in vivo active mGluR4 positive allosteric modulator".Probe Reports from the NIH Molecular Libraries Program [Internet].PMID21433377.
^Beqollari D, Kammermeier PJ (July 2008). "The mGlu(4) receptor allosteric modulator N-phenyl-7-(hydroxyimino)cyclopropa[b]chromen-1a-carboxamide acts as a direct agonist at mGlu(6) receptors".European Journal of Pharmacology.589 (1–3):49–52.doi:10.1016/j.ejphar.2008.06.054.PMID18593581.
Flor PJ, Lukic S, Rüegg D, Leonhardt T, Knöpfel T, Kuhn R (February 1995). "Molecular cloning, functional expression and pharmacological characterization of the human metabotropic glutamate receptor type 4".Neuropharmacology.34 (2):149–155.doi:10.1016/0028-3908(94)00149-M.PMID7617140.S2CID31399907.
Gomeza J, Mary S, Brabet I, Parmentier ML, Restituito S, Bockaert J, et al. (October 1996). "Coupling of metabotropic glutamate receptors 2 and 4 to G alpha 15, G alpha 16, and chimeric G alpha q/i proteins: characterization of new antagonists".Molecular Pharmacology.50 (4):923–930.doi:10.1016/S0026-895X(25)09394-0.PMID8863838.
Barbon A, Ferraboli S, Barlati S (2000). "Assignment of the human metabotropic glutamate receptor gene GRM4 to chromosome 6 band p21.3 by radiation hybrid mapping".Cytogenetics and Cell Genetics.88 (3–4): 210.doi:10.1159/000015551.PMID10828590.S2CID85055574.
Ohtsuki T, Toru M, Arinami T (June 2001). "Mutation screening of the metabotropic glutamate receptor mGluR4 (GRM4) gene in patients with schizophrenia".Psychiatric Genetics.11 (2):79–83.doi:10.1097/00041444-200106000-00004.PMID11525421.S2CID752064.