@article{TAC_2021_36_a1,
     author = {Ronald Brown and George Janelidze and George Peschke},
     title = {Van {Kampen's} theorem for locally sectionable maps},
     journal = {Theory and applications of categories},
     pages = {48--64},
     publisher = {mathdoc},
     volume = {36},
     year = {2021},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/TAC_2021_36_a1/}
}