@article{10_4064_fm_108_2_99_107,
     author = {A. Layek and S. Mukhopadhyay},
     title = {Intersection of sectorial cluster sets and directional essential cluster sets},
     journal = {Fundamenta Mathematicae},
     pages = {99--107},
     publisher = {mathdoc},
     volume = {108},
     number = {2},
     year = {1980},
     doi = {10.4064/fm-108-2-99-107},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.4064/fm-108-2-99-107/}
}