Bhargava, S., K. R. Rajanna, and K. R. Vasuki. 2014. “On Some Ramanujan Identities for the Ratios of Eta-Functions”. Ukrains’kyi Matematychnyi Zhurnal 66 (8), 1011–1028. https://umj.imath.kiev.ua/index.php/umj/article/view/2196.