@article{10_4064_ap_6_3_305_322,
     author = {W. Mlak},
     title = {Limitations and dependence on parameter of solutions of non-stationary differential operator equations},
     journal = {Annales Polonici Mathematici},
     pages = {305--322},
     publisher = {mathdoc},
     volume = {6},
     number = {3},
     year = {1959},
     doi = {10.4064/ap-6-3-305-322},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.4064/ap-6-3-305-322/}
}