@article{BMMS_2011_34_2_a13,
     author = {Young Bae Jun and Hee Sik Kim and Chul Hwan Park},
     title = {Positive {Implicative} {Ideals} of  {BCK-Algebras} {Based} on a {Soft} {Set} {Theory}},
     journal = {Bulletin of the Malaysian Mathematical Society},
     year = {2011},
     volume = {34},
     number = {2},
     url = {http://geodesic.mathdoc.fr/item/BMMS_2011_34_2_a13/}
}