@article{RCM_1978__12_181671,
     author = {S. K. Bajpai},
     title = {Special arithmetic and geometric means preserve ...-like univalence},
     journal = {Revista colombiana de matematicas},
     pages = {83--90},
     year = {1978},
     volume = {12},
     zbl = {0414.30010},
     url = {http://geodesic.mathdoc.fr/item/RCM_1978__12_181671/}
}