@article{AFM_1976_2_1_a30,
     author = {M. A. Lavrentiev and M. M. Lavrentiev},
     title = {On some inequalities for space harmonic functions},
     journal = {Annales Fennici Mathematici},
     pages = {303--306},
     year = {1976},
     volume = {2},
     number = {1},
     doi = {10.5186/aasfm.1976.0219},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.5186/aasfm.1976.0219/}
}