中国科学院数学与系统科学研究院期刊网
Twist Property and the Second Order Differential Equations Without a Priori Bounds
Xi Ying SUN, Ding Bian QIAN
Acta Mathematica Sinica, Chinese Series . 2009, (6): 1199 -1206 .  DOI: 10.12386/A2009sxxb0149