@book{kniha1998a,
title = {Metric Preserving Functions},
author = {Jozef Doboš},
url = {http://web.science.upjs.sk/jozefdobos/wp-content/uploads/2012/03/mpf1.pdf},
isbn = {80-88896-30-4},
year = {1998},
date = {1998-03-01},
publisher = {Štroffek},
address = {Košice},
keywords = {metric preserving functions}
}