@article{RCM_2018_52_2_a3,
     author = {Mireya Bracamonte and Jos\'e Gim\'enez and Jes\'us Medina},
     title = {Sandwich theorem for reciprocally strongly convex functions},
     journal = {Revista colombiana de matematicas},
     pages = {171--184},
     publisher = {mathdoc},
     volume = {52},
     number = {2},
     year = {2018},
     url = {http://geodesic.mathdoc.fr/item/RCM_2018_52_2_a3/}
}