How to differentiate a number.
Ufnarovski, Victor ; Åhlander, Bo
Journal of Integer Sequences [electronic only], Tome 6 (2003), / Harvested from The Electronic Library of Mathematics
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Publié le : 2003-01-01
EUDML-ID : urn:eudml:doc:54388 
@article{02000850,
     title = {How to differentiate a number.},
     journal = {Journal of Integer Sequences [electronic only]},
     volume = {6},
     year = {2003},
     zbl = {1142.11305},
     language = {en},
     url = {http://dml.mathdoc.fr/item/02000850}
}

Ufnarovski, Victor; Åhlander, Bo. How to differentiate a number.. Journal of Integer Sequences [electronic only], Tome 6 (2003) . http://gdmltest.u-ga.fr/item/02000850/