@article{10_2298_PIM0693109S,
     author = {Christoph Schmoeger},
     title = {Common {Spectral} {Properties} of {Linear} {Operators} {A} and {B} {Such} {That} {ABA=A\protect\textsuperscript{2}} and {BAB=B\protect\textsuperscript{2}}},
     journal = {Publications de l'Institut Math\'ematique},
     pages = {109 },
     publisher = {mathdoc},
     volume = {_N_S_79},
     number = {93},
     year = {2006},
     doi = {10.2298/PIM0693109S},
     zbl = {1122.47004},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.2298/PIM0693109S/}
}