@article{10_21136_MB_2016_4,
     author = {Chahbi, Abdellatif and Kabbaj, Samir and Charifi, Ahmed},
     title = {Linear maps preserving $A$-unitary operators},
     journal = {Mathematica Bohemica},
     pages = {59--70},
     publisher = {mathdoc},
     volume = {141},
     number = {1},
     year = {2016},
     doi = {10.21136/MB.2016.4},
     mrnumber = {3475137},
     zbl = {06562158},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.21136/MB.2016.4/}
}