Nonrelativistic Limit of Generalized MIT Bag Models and Spectral Inequalities. [PDF]
MR2736188 (Review) 82D10 (35Q40 82D37)Chen, Li; Chen, Xiuqing; Zhang, Chunlei Vanishing electron mass limit in the bipolar Euler-Poisson system. Nonlinear Anal. Real World Appl. 12 (2011), no. 2, 1002–1012