@article{DMGAA_2013_33_2_a7,
     author = {Bandaru, Ravi and Shum, K.},
     title = {Vague ideals of implication groupoids},
     journal = {Discussiones Mathematicae. General Algebra and Applications},
     pages = {221--231},
     publisher = {mathdoc},
     volume = {33},
     number = {2},
     year = {2013},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/DMGAA_2013_33_2_a7/}
}