@article {MR3521488,
	title = {Degrees that are not degrees of categoricity},
	journal = {Notre Dame J. Form. Log.},
	volume = {57},
	number = {3},
	year = {2016},
	pages = {389{\textendash}398},
	issn = {0029-4527},
	doi = {DOI:10.1215/00294527-3496154},
	url = {https://doi.org/DOI:10.1215/00294527-3496154},
	author = {Anderson, Bernard and Csima, Barbara}
}
