@article{10_4064_ap_44_3_239_243,
     author = {Shigeru Haruki},
     title = {Four different unknown functions satisfying the triangle mean value property for harmonic polynomials, {II}},
     journal = {Annales Polonici Mathematici},
     pages = {239--243},
     publisher = {mathdoc},
     volume = {44},
     number = {3},
     year = {1984},
     doi = {10.4064/ap-44-3-239-243},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.4064/ap-44-3-239-243/}
}