Jianfeng Ge, Aikifa Raza, Fu Fen, Yang Si, Yang Li, Jianyong Yu and Bin Ding. (2012). Mechanically Robust Polyurethane Microfibrous Membranes Exhibiting High Air Permeability. Journal of Fiber Bioengineering and Informatics. 5 (4). 411-421. doi:10.3993/jfbi12201206