@article{lack_2002,
 title = {Codescent objects and coherence},
 author = {Lack, Stephen},
 year = {2002},
 journal = {Journal of Pure and Applied Algebra},
 volume = {175},
 number = {1--3},
 pages = {223--241},
 doi = {10.1016/S0022-4049(02)00136-6}
}