Xin, D., Bisgaard, M., Busse, H.-J., Olsen, R.H., Hess, C., Aalbaek, B., Olsen, J.E., Christensen, H. 2019. Reclassification of Bisgaard taxon 37 and taxon 44 as Psittacicella melopsittaci gen. nov., sp. nov., Psittacicella hinzii sp. nov. and Psittacicella gerlachiana sp. nov. within Psittacicellaceae fam. nov. of the order Pasteurellales. Int. J. Syst. Evol. Microbiol. 69 : 350-355.