@article{10_4064_sm_29_2_125_132,
     author = {Kenneth Leland},
     title = {Characterizations of solutions of {\ensuremath{\Delta}f=cf}},
     journal = {Studia Mathematica},
     pages = {125--132},
     publisher = {mathdoc},
     volume = {29},
     number = {2},
     year = {1967},
     doi = {10.4064/sm-29-2-125-132},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.4064/sm-29-2-125-132/}
}