Lovenberg, Crowe, Liu et al.: "Cloning of a cDNA encoding a novel interleukin-1 receptor related protein (IL 1R-rp2)." in: Journal of neuroimmunology, Vol. 70, Issue 2, pp. 113-22, 1996 (PubMed).
Torigoe, Ushio, Okura et al.: "Purification and characterization of the human interleukin-18 receptor." in: The Journal of biological chemistry, Vol. 272, Issue 41, pp. 25737-42, 1997 (PubMed).
Dale, Nicklin: "Interleukin-1 receptor cluster: gene organization of IL1R2, IL1R1, IL1RL2 (IL-1Rrp2), IL1RL1 (T1/ST2), and IL18R1 (IL-1Rrp) on human chromosome 2q." in: Genomics, Vol. 57, Issue 1, pp. 177-9, 1999 (PubMed).
Debets, Timans, Homey et al.: "Two novel IL-1 family members, IL-1 delta and IL-1 epsilon, function as an antagonist and agonist of NF-kappa B activation through the orphan IL-1 receptor-related protein 2." in: Journal of immunology (Baltimore, Md. : 1950), Vol. 167, Issue 3, pp. 1440-6, 2001 (PubMed).