Liu Z, Wang Y, Zhang J, Ding J, Guo L, Cui D, Fei J (March 2001). „Orphanin FQ: an endogenous antagonist of rat brain dopamine transporter”. Neuroreport12 (4): 699–702. DOI:10.1097/00001756-200103260-00017. PMID11277567.
Mørk H, Hommel K, Uddman R, Edvinsson L, Jensen R (September 2002). „Does nociceptin play a role in pain disorders in man?”. Peptides23 (9): 1581–7. DOI:10.1016/S0196-9781(02)00101-8. PMID12217418.
Scoto GM, Aricò G, Ronsisvalle S, Parenti C (July 2007). „Blockade of the nociceptin/orphanin FQ/NOP receptor system in the rat ventrolateral periaqueductal gray potentiates DAMGO analgesia”. Peptides28 (7): 1441–6. DOI:10.1016/j.peptides.2007.05.013. PMID17628212.
Redrobe JP, Calo' G, Regoli D, Quirion R (February 2002). „Nociceptin receptor antagonists display antidepressant-like properties in the mouse forced swimming test”. Naunyn Schmiedebergs Arch. Pharmacol.365 (2): 164–7. DOI:10.1007/s00210-001-0511-0. PMID11819035.
Liu Z, Wang Y, Zhang J, Ding J, Guo L, Cui D, Fei J (March 2001). „Orphanin FQ: an endogenous antagonist of rat brain dopamine transporter”. Neuroreport12 (4): 699–702. DOI:10.1097/00001756-200103260-00017. PMID11277567.
Mørk H, Hommel K, Uddman R, Edvinsson L, Jensen R (September 2002). „Does nociceptin play a role in pain disorders in man?”. Peptides23 (9): 1581–7. DOI:10.1016/S0196-9781(02)00101-8. PMID12217418.
Scoto GM, Aricò G, Ronsisvalle S, Parenti C (July 2007). „Blockade of the nociceptin/orphanin FQ/NOP receptor system in the rat ventrolateral periaqueductal gray potentiates DAMGO analgesia”. Peptides28 (7): 1441–6. DOI:10.1016/j.peptides.2007.05.013. PMID17628212.
Redrobe JP, Calo' G, Regoli D, Quirion R (February 2002). „Nociceptin receptor antagonists display antidepressant-like properties in the mouse forced swimming test”. Naunyn Schmiedebergs Arch. Pharmacol.365 (2): 164–7. DOI:10.1007/s00210-001-0511-0. PMID11819035.