@article {MR3631290,
	title = {Degrees of categoricity on a cone via η-systems},
	journal = {J. Symb. Log.},
	volume = {82},
	number = {1},
	year = {2017},
	pages = {325{\textendash}346},
	issn = {0022-4812},
	doi = {10.1017/jsl.2016.43},
	url = {https://doi.org/10.1017/jsl.2016.43},
	author = {Csima, Barbara F. and Harrison-Trainor, Matthew}
}