@article{10_4153_CMB_2017_027_4,
     author = {Chang, Der-Chen and Yang, Nanping and Wu, Hsi-Chun},
     title = {Poincar\'e {Lemma} on {Quaternion-like} {Heisenberg} {Groups}},
     journal = {Canadian mathematical bulletin},
     pages = {495--508},
     year = {2018},
     volume = {61},
     number = {3},
     doi = {10.4153/CMB-2017-027-4},
     url = {http://geodesic.mathdoc.fr/articles/10.4153/CMB-2017-027-4/}
}