@article{TAC_2006_16_a27,
     author = {Elango Panchadcharam and Ross Street},
     title = {Pullback and finite coproduct preserving functors between categories of permutation representations},
     journal = {Theory and applications of categories},
     pages = {771--784},
     publisher = {mathdoc},
     volume = {16},
     year = {2006},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/TAC_2006_16_a27/}
}