Geodesic
Basic Concepts of Leibnitz Calculus
Matematičeskoe obrazovanie, no. 4 (2009), pp. 24-35 
H. J. M. Bos. Basic Concepts of Leibnitz Calculus. Matematičeskoe obrazovanie, no. 4 (2009), pp. 24-35. http://geodesic.mathdoc.fr/item/MO_2009_4_a3/
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     author = {H. J. M. Bos},
     title = {Basic {Concepts} of {Leibnitz} {Calculus}},
     journal = {Matemati\v{c}eskoe obrazovanie},
     pages = {24--35},
     year = {2009},
     number = {4},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/MO_2009_4_a3/}
}
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Voir la notice de l'article provenant de la source Math-Net.Ru

It is shown that Leibnitz calculus based on the concept of "variable" and "progression of a variable" (in opposition to the modern concept of function) is a self–consistent, beautiful and applicable theory.