YongSup Shin Jongsung Kim Guil Kim Seokhie Hong Sangjin Lee Differential-Linear Type Attacks on Reduced Rounds of SHACAL-2. 110-122 http://springerlink.metapress.com/openurl.asp?genre=article&issn=0302-9743&volume=3108&spage=110 2004 conf/acisp/2004 ACISP db/conf/acisp/acisp2004.html#ShinKKHL04