@article{ELMA_1971__26_141033,
     author = {D. Suryanarayana},
     title = {New {Inversion} {Properties} of ... and ...*.},
     journal = {Elemente der Mathematik},
     pages = {136--137},
     publisher = {mathdoc},
     volume = {26},
     year = {1971},
     zbl = {0224.10007},
     url = {http://geodesic.mathdoc.fr/item/ELMA_1971__26_141033/}
}