@article{10_4064_sm214_2_2,
     author = {Pietro Aiena and Elvis Aponte},
     title = {Polaroid type operators under perturbations},
     journal = {Studia Mathematica},
     pages = {121--136},
     year = {2013},
     volume = {214},
     number = {2},
     doi = {10.4064/sm214-2-2},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.4064/sm214-2-2/}
}