%0 Journal Article
%A N. Abe
%T First extension groups of Verma modules and R-polynomials
%J Journal of Lie theory
%D 2015
%P 377-393
%V 25
%N 2
%U http://geodesic.mathdoc.fr/item/JLT_2015_25_2_JLT_2015_25_2_a3/
%F JLT_2015_25_2_JLT_2015_25_2_a3