"Sergio Calle","Renormalization group equation for volume dependence of the O(N)sigma model",,,,,,,2018,Mar. "Sergio Calle","Renormalization group equation for volume dependence of the O(N)sigma model",,,,,,,2018,Mar. "Sergio Calle","Renormalization group equation for volume dependence of the O(N)sigma model",,,,,,,2018,Mar.