@article{MS2_1991__68_1_167159,
     author = {Stephen J. Gardiner},
     title = {Maximum principles for subharmonic functions.},
     journal = {Mathematica Scandinavica},
     pages = {210--220},
     publisher = {mathdoc},
     volume = {68},
     number = {1},
     year = {1991},
     zbl = {0731.31007},
     url = {http://geodesic.mathdoc.fr/item/MS2_1991__68_1_167159/}
}