@article{10_5817_AM2019_4_249,
     author = {Esmeral, Kevin and Ferrer, Osmin and Jalk, Jorge and Lora Castro, Boris},
     title = {On hyponormal operators in {Krein} spaces},
     journal = {Archivum mathematicum},
     pages = {249--259},
     publisher = {mathdoc},
     volume = {55},
     number = {4},
     year = {2019},
     doi = {10.5817/AM2019-4-249},
     mrnumber = {4038360},
     zbl = {07144740},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.5817/AM2019-4-249/}
}