Isothermal Vapor-Liquid Equilibria of Binary Mixtures of Nitrogen with Dimethyl Sulfoxide, N-Methyl-2-pyrrolidone, and Diethylene Glycol Monobutyl Ether at Elevated Pressures Weng, W.L.; Chen, J.T.; Yang, J.W.; Chang, J.S.; Journal of Chemical & Engineering Data 2007, 52, 511-516