@article{AM2_1980__21_182416,
     author = {Shigeru Haruki},
     title = {Note on the equation (...-...)f = 0.},
     journal = {Aequationes mathematicae},
     pages = {49--52},
     publisher = {mathdoc},
     volume = {21},
     year = {1980},
     zbl = {0462.39006},
     url = {http://geodesic.mathdoc.fr/item/AM2_1980__21_182416/}
}