@article{JTNB_2003__15_1_309_0,
     author = {Ladislav Mi\v{s}{\'\i}k and J\'anos T. T\'oth},
     title = {Logarithmic density of a sequence of integers and density of its ratio set},
     journal = {Journal de th\'eorie des nombres de Bordeaux},
     pages = {309--318},
     publisher = {Universit\'e Bordeaux I},
     volume = {15},
     number = {1},
     year = {2003},
     zbl = {02058871},
     mrnumber = {2019018},
     language = {en},
     url = {https://jtnb.centre-mersenne.org/item/JTNB_2003__15_1_309_0/}
}