id: 60011686
dt: a
an: 60011686
au: Broer, Henk W.
ti: Normal forms in perturbation theory
so: Encyclopedia of Complexity and Systems Science, 6310-6329 (2009).
py: 2009
pu: 
la: EN
cc: 
ut: 
ci: 
li: doi:10.1007/978-0-387-30440-3_372