@article{DOCMA_2021__26__a11,
     author = {Nyland, Petter and Ortega, Eduard},
     title = {Matui's {AH} conjecture for graph groupoids},
     journal = {Documenta mathematica},
     pages = {1679--1727},
     publisher = {mathdoc},
     volume = {26},
     year = {2021},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/DOCMA_2021__26__a11/}
}