@ARTICLE{Noack2013cma, AUTHOR = {Noack, B.~R.\ and Niven, R.~K.}, YEAR = 2013, TITLE = {A hierarchy of maximum-entropy closures for {G}alerkin systems of incompressible flows}, JOURNAL= {Comp.\ Math.\ Appl.}, VOLUME = {65}, PAGES = {1558--1574}}