@article{CRMATH_2004__338_9_697_0,
     author = {Michel, Philippe and Mischler, St\'ephane and Perthame, Beno{\i}̂t},
     title = {General entropy equations for structured population models and scattering},
     journal = {Comptes Rendus. Math\'ematique},
     pages = {697--702},
     publisher = {Elsevier},
     volume = {338},
     number = {9},
     year = {2004},
     doi = {10.1016/j.crma.2004.03.006},
     language = {en},
     url = {http://www.numdam.org/articles/10.1016/j.crma.2004.03.006/}
}