@article{AMI_2003_30_a3,
     author = {J\'ozsef Bukor and J\'anos T. T\'oth},
     title = {On accumulation points of generalized ratio sets of positive integers},
     journal = {Annales mathematicae et informaticae},
     pages = {37--43},
     publisher = {mathdoc},
     volume = {30},
     year = {2003},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/AMI_2003_30_a3/}
}