@article{10_1017_S0017089521000434,
     author = {Oliveira, Andr\'e G.},
     title = {Principal bundles on two-dimensional {CW-complexes} with disconnected structure group},
     journal = {Glasgow mathematical journal},
     pages = {675--690},
     year = {2022},
     volume = {64},
     number = {3},
     doi = {10.1017/S0017089521000434},
     url = {http://geodesic.mathdoc.fr/articles/10.1017/S0017089521000434/}
}