Before revision:  Finance 2, 6 (2002), 443--453], and then show the validity of a refined expansion of the type \% BS( k,T) ^{2}T=( 1k^{1/2}+2+...
After revision:  Finance 2, 6 (2002), 443--453], and then show the validity of a refined expansion of the type BS( k,T) ^{2}T=( 1k^{1/2}+2+...