@article{BMMS_2008_31_2_a9,
     author = {Esen Iyigun and Kadri Arslan and Gunay Ozturk},
     title = {A {Characterization} of {Chen} {Surfaces} in {E4}},
     journal = {Bulletin of the Malaysian Mathematical Society},
     year = {2008},
     volume = {31},
     number = {2},
     url = {http://geodesic.mathdoc.fr/item/BMMS_2008_31_2_a9/}
}