Qureshi, A., M. Al-Moundhri, M. Al-Shaibi, I. Al-Haddabi, and A. Mittal. “Primary Gastric Yolk Sac Tumour”. Sultan Qaboos University Medical Journal, vol. 18, no. 3, Dec. 2018, pp. e383-385, doi:10.18295/squmj.2018.18.03.020.