@article{10_4064_sm189_3_6,
     author = {Adam Bobrowski and Rados{\l}aw Bogucki},
     title = {Semigroups generated by convex combinations of several {Feller
}  generators in models of mathematical biology},
     journal = {Studia Mathematica},
     pages = {287--300},
     publisher = {mathdoc},
     volume = {189},
     number = {3},
     year = {2008},
     doi = {10.4064/sm189-3-6},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.4064/sm189-3-6/}
}