Kenichi Toyozumi Naoya Yamada Kenji Mase Takayuki Kitasaka Kensaku Mori Yasuhito Suenaga Tomoichi Takahashi A Study of Symbol Segmentation Method for Handwritten Mathematical Formula Recognition using Mathematical Structure Information. 630-633 2004 ICPR (2) http://csdl.computer.org/comp/proceedings/icpr/2004/2128/02/212820630abs.htm db/conf/icpr/icpr2004-2.html#ToyozumiYMKMST04