@article{BMMS_1999_22_2_a5,
     author = {Siti Mariyam Hj. Shamsuddin and Md. Nasir Sulaiman and Maslina Darus},
     title = {Classification
                          and {Clustering} of {Printed} {Mathematical} {Symbols} with
                          {Improved} {Backpropagation} {andSelf-Organizing} {Map}},
     journal = {Bulletin of the Malaysian Mathematical Society},
     year = {1999},
     volume = {22},
     number = {2},
     url = {http://geodesic.mathdoc.fr/item/BMMS_1999_22_2_a5/}
}