Bhargava, S., Mahadeva, N. M. S., & Maheshkumar, M. C. (2009). A modular transformation for a generalized theta function with multiple parameters. Ukrains’kyi Matematychnyi Zhurnal, 61(8), 1040-1052. https://umj.imath.kiev.ua/index.php/umj/article/view/3079