@article{Tillmann2023a,
	author = {A.M. Tillmann},
	title = {On the Computational Intractability of Exact and Approximate Dictionary Learning},
	journal = {IEEE Signal Processing Letters},
	year = {2015},
	number = {1},
	pages = {45--49},
	volume = {22},
	month = {Jan},
	doi = {10.1109/LSP.2014.2345761}
}