7Vetere A. Vapor-liquid equilibria for mixtures containing cis-but-2-ene, 1, 3-butadiene, and N-formylmorpholine measured with the vangeli equilibrium still [J]. J Cbem Eng Data,1999,44:98-100.
8Cincotti A, Murru M, Cao G C, et al. Liquid-liquid equilib- ria of hydro-carbons with N-formylmorpholine E] 1. J Chem Eng Data, 1999,44 : 480-483.