NIELSEN'S AND EULER'S OPERATORS OF HIGHER ORDER IN ANALYTICAL MECHANICS
刘正福;金伏生;梅凤翔
NIELSEN'S AND EULER'S OPERATORS OF HIGHER ORDER IN ANALYTICAL MECHANICS
Liu Zheng-fu;Jin Fu-sheng;Mei Feng-xiang
Applied Mathematics and Mechanics (English Edition) . 1986, (1): 53 -63 . 

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