@article {aja2013effective, title = {Effective noise estimation and filtering from correlated multiple-coil MR data}, journal = {Magnetic resonance imaging}, volume = {31}, number = {2}, year = {2013}, pages = {272{\textendash}285}, publisher = {Elsevier}, author = {Santiago Aja-Fern{\'a}ndez and V{\'e}ronique Brion and Antonio Trist{\'a}n-Vega} }