FIBRATIONS OF GROUPOIDS

[1] COGLUEING HOMOTOPY EQUIVALENCES [J]. MATHEMATISCHE ZEITSCHRIFT, 1970, 113 (04) : 313 - &

[2] Brown R., 1968, ELEMENTS MODERN TOPO

[3] GRAY JW, 1966, 1965 P C CAT ALG LA

[4] GRUSHKOS THEOREM [J]. JOURNAL OF ALGEBRA, 1966, 4 (03) : 365 - &

[5] HIGGINS PJ, 1965, CATEGORIES GROUPOIDS

[6] Serre J, 1964, COHOMOLOGIE GALOISIE

[7] Spanier E, 1966, ALGEBRAIC TOPOLOGY, DOI 10.1007/978-1-4684-9322-1

[1] COGLUEING HOMOTOPY EQUIVALENCES [J]. MATHEMATISCHE ZEITSCHRIFT, 1970, 113 (04) : 313 - &

[2] Brown R., 1968, ELEMENTS MODERN TOPO

[3] GRAY JW, 1966, 1965 P C CAT ALG LA

[4] GRUSHKOS THEOREM [J]. JOURNAL OF ALGEBRA, 1966, 4 (03) : 365 - &

[5] HIGGINS PJ, 1965, CATEGORIES GROUPOIDS

[6] Serre J, 1964, COHOMOLOGIE GALOISIE

[7] Spanier E, 1966, ALGEBRAIC TOPOLOGY, DOI 10.1007/978-1-4684-9322-1