@article{SEMR_2017_14_a19,
     author = {Dino Rossegger},
     title = {On functors enumerating structures},
     journal = {Sibirskie \`elektronnye matemati\v{c}eskie izvesti\^a},
     pages = {690--702},
     publisher = {mathdoc},
     volume = {14},
     year = {2017},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/SEMR_2017_14_a19/}
}