@misc{RSMUP_1971__46__421_0, title = {Errata}, journal = {Rendiconti del Seminario Matematico della Universit\`a di Padova}, pages = {421--421}, publisher = {Seminario Matematico of the University of Padua}, volume = {46}, year = {1971}, language = {it}, url = {http://www.numdam.org/item/RSMUP_1971__46__421_0/} }