@article{NSJOM_1988_18_1a_11,
     author = {Pap Endre},
     title = {Bijective maps which are close to 

 partial isometries},
     journal = {Novi Sad Journal of Mathematics},
     pages = {119-127},
     year = {1988},
     volume = {18},
     number = {1},
     url = {http://geodesic.mathdoc.fr/item/NSJOM_1988_18_1a_11/}
}