@article{10_2298_FIL2311513A,
     author = {Aymen Ammar and Aref Jeribi and Bilel Saadaoui},
     title = {Characterization of the essential approximation s-spectrum and the essential defect s-spectrum in a right quaternionic {Hilbert} space},
     journal = {Filomat},
     pages = {3513 },
     year = {2023},
     volume = {37},
     number = {11},
     doi = {10.2298/FIL2311513A},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.2298/FIL2311513A/}
}