Kaatsch P, Häfner C, Calaminus G, Blettner M, Tulla M (January 2015). "Pediatric germ cell tumors from 1987 to 2011: incidence rates, time trends, and survival". Pediatrics. 135 (1): e136-43. doi:10.1542/peds.2014-1989. PMID25489016. S2CID1149576.
Kaatsch P, Häfner C, Calaminus G, Blettner M, Tulla M (January 2015). "Pediatric germ cell tumors from 1987 to 2011: incidence rates, time trends, and survival". Pediatrics. 135 (1): e136-43. doi:10.1542/peds.2014-1989. PMID25489016. S2CID1149576.
Kaatsch P, Häfner C, Calaminus G, Blettner M, Tulla M (January 2015). "Pediatric germ cell tumors from 1987 to 2011: incidence rates, time trends, and survival". Pediatrics. 135 (1): e136-43. doi:10.1542/peds.2014-1989. PMID25489016. S2CID1149576.