@article{DMGAA_2013_33_1_a3,
     author = {Borzooei, Rajab and Paad, Akbar},
     title = {Fuzzy n-fold integral filters in {BL-algebras}},
     journal = {Discussiones Mathematicae. General Algebra and Applications},
     pages = {57--71},
     publisher = {mathdoc},
     volume = {33},
     number = {1},
     year = {2013},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/DMGAA_2013_33_1_a3/}
}