@article{AMI_1997_24_a0,
     author = {Bui Minh Phong},
     title = {A characterization of the identity function},
     journal = {Annales mathematicae et informaticae},
     pages = {3--9},
     publisher = {mathdoc},
     volume = {24},
     year = {1997},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/AMI_1997_24_a0/}
}