Lanjewar, S. M., V. Nandagawali, D. Sagrule, P. Lavankar, K. M. Surana, P. Khuje, and S. Bhalerao. “A Rare Case of Sister Mary Joseph Nodule As the Only Sign of Unknown Primary Malignancy”. International Surgery Journal, vol. 3, no. 3, Dec. 2016, pp. 1682-4, doi:10.18203/2349-2902.isj20162776.