中国科学院数学与系统科学研究院期刊网
THE COMPLEX BIFURCATIONS IN 2-JET SYSTEM AND 3-JET SYSTEM
Tang Jian-ning, Liu Zheng-rong
Acta Mathematicae Applicatae Sinica . 1988, (2): 173 -181 .  DOI: 10.12387/C1988020