中国科学院数学与系统科学研究院期刊网
EQUALITY BETWEEN WU-CHARACTERISTIC SETS AND JANET BASES FOR LINEAR HOMOGENEOUS PARTIAL DIFFERENTIAL EQUATIONS
Zhang Shanqing;Li Zhibin;Pan Suqi
Journal of Systems Science and Mathematical Sciences . 2005, (4): 429 -438 .  DOI: 10.12341/jssms09583