Nourbakhsh, Erfan, Mohsen Shadmehri, and Shahram Abbassi. 2013. “Self-Gravitational Collapse of Polytropic Mass-Losing Gaseous Discs: Effects of Outer Boundary Condition Dictated by Parent Cloud”. In Feeding Compact Objects: Accretion on All Scales, Proceedings of the International Astronomical Union, IAU Symposium, edited by C. M. Zhang, T. Belloni, M. Méndez, and S. N. Zhang, 290:285-86. doi:10.1017/S1743921312020030.