@article {baerland2020observation,
	title = {An observation on the uniform preconditioners for the mixed Darcy problem},
	journal = {Numerical Methods for Partial Differential Equations},
	volume = {36},
	number = {6},
	year = {2020},
	pages = {1718{\textendash}1734},
	publisher = { Wiley},
	author = {B{\ae}rland, Trygve and Kuchta, Miroslav and Mardal, Kent-Andre and Thompson, Travis}
}
