Rudaitis, Vilius, et al. “Successful Treatment of Advanced Stage Yolk Sac Tumour of Extragonadal Origin: A Case Report and Review of Literature ”. Acta Medica Lituanica, vol. 23, no. 2, July 2016, pp. 110-6, https://doi.org/10.6001/actamedica.v23i2.3327.