%0 Journal Article
%A Vesselin Drensky
%A Ralf Holtkamp
%T Planar trees, free nonassociative algebras, invariants, and elliptic integrals
%J Algebra and discrete mathematics
%D 2008
%P 1-41
%N 2
%I mathdoc
%U http://geodesic.mathdoc.fr/item/ADM_2008_2_a0/
%G en
%F ADM_2008_2_a0