Transition Between Spirals with Different Arm-number
LIU Shu-hua,DONG Li-fang,WANG Hong-fang,LIU Wei-li,HAO Ya-juan,RAN Jun-xia
Journal of Hebei University (Natural Science Edition) . 2007, (4): 357 -360 .  DOI: 10.3969/j.issn.1000-1565.2007.04.006