See discussions, stats, and author profiles for this publication at: https://www.researchgate.net/publication/252495491 On the ring of constants for derivations of power series rings in two variables Article in Colloquium Mathematicum · January 2001 DOI: 10.4064/cm87-2-5 CITATIONS 0 READS 11 2 authors: Leonid Makar-Limanov Wayne State University 77 PUBLICATIONS 965 CITATIONS SEE PROFILE Andrzej Nowicki Nicolaus Copernicus University 110 PUBLICATIONS 826 CITATIONS SEE PROFILE All content following this page was uploaded by Andrzej Nowicki on 26 September 2014. The user has requested enhancement of the downloaded file. All in-text references underlined in blue are added to the original document and are linked to publications on ResearchGate, letting you access and read them immediately.