@article{10_4064_ap_51_1_341_348,
     author = {Bogdan Ziemian},
     title = {Mean value theorems for linear and semi-linear rotation invariant operators},
     journal = {Annales Polonici Mathematici},
     pages = {341--348},
     publisher = {mathdoc},
     volume = {51},
     number = {1},
     year = {1990},
     doi = {10.4064/ap-51-1-341-348},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.4064/ap-51-1-341-348/}
}