@incollection{Lantzberg2015, author = {Daniel Lantzberg}, title = {Rank-M Frame Multipliers and Optimality Criterions for Density Operators of Rank M}, booktitle = {Current Trends in Aanalysis and Its Applications}, volume = {2015}, isbn = {978-3-319-12576-3}, doi = {10.1007/978-3-319-12577-0_76}, year = {2015}, }