N. Verma, V. Tiwari, S. P. Sharma, P. Singh, M. Rathi, and T. Gupta, “Clinico-pathological correlation of ovarian tumors and tumor like lesions with role of CA125 and HE4 as biomarkers for discrimination of benign and malignant ovarian tumors”, Int J Res Med Sci, vol. 6, no. 7, pp. 2238–2242, Jun. 2018.