@article{10_4064_sm_105_1_13_23,
     author = {Wies{\l}aw Cupa{\l}a},
     title = {Some estimates concerning the {Zeeman} effect},
     journal = {Studia Mathematica},
     pages = {13--23},
     publisher = {mathdoc},
     volume = {105},
     number = {1},
     year = {1993},
     doi = {10.4064/sm-105-1-13-23},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.4064/sm-105-1-13-23/}
}