Rational Index of Context-Free Languages in exp Theta(p root n) and n^(Theta((ln n)^(1/p))).

Laurent Pierre Jean-Marc Farinone Rational Index of Context-Free Languages in exp Theta(p root n) and n^(Theta((ln n)^(1/p))). 185-204 1988 57 Theor. Comput. Sci. db/journals/tcs/tcs57.html#PierreF88