@article{10_2298_FIL2213277A,
     author = {Aymen Ammar and Fatima Zohra Boutaf and Aref Jeribi},
     title = {Extended eigenvalues of a closed linear operator},
     journal = {Filomat},
     pages = {4277 },
     year = {2022},
     volume = {36},
     number = {13},
     doi = {10.2298/FIL2213277A},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.2298/FIL2213277A/}
}