TY  - BOOK
AU  - Van Den Essen,Arno
TI  - Kernels of elementary derivations
T2  - Report 9548
AV  - QA3.R46 no.9548 
PY  - 1993///
CY  - Nijmegen
PB  - Department of Mathematics Catholic University
KW  - Kernels functions
N1  - Includes bibliographical references
ER  -