@article{RM_2015_70_4_a0,
     author = {M. L. Gromov},
     title = {Colourful categories},
     journal = {Trudy Matematicheskogo Instituta imeni V.A. Steklova},
     pages = {591--655},
     publisher = {mathdoc},
     volume = {70},
     number = {4},
     year = {2015},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/RM_2015_70_4_a0/}
}