@article{AMI_2003_30_a13,
     author = {\v{S}tefan Porubsk\'y},
     title = {Structure of the group of quasi multiplicative arithmetical functions},
     journal = {Annales mathematicae et informaticae},
     pages = {133--145},
     publisher = {mathdoc},
     volume = {30},
     year = {2003},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/AMI_2003_30_a13/}
}