@article {MR2338404,
	title = {The residual-free-bubble finite element method on anisotropic partitions},
	journal = {SIAM J. Numer. Anal.},
	volume = {45},
	number = {4},
	year = {2007},
	pages = {1654{\textendash}1678},
	issn = {0036-1429},
	doi = {10.1137/060658011},
	url = {https://doi.org/10.1137/060658011},
	author = {Andrea Cangiani and S{\"u}li, Endre}
}
