Uruguayan footballer Pedro Petrone Schiavone with A.C. Fiorentina in the early 1930s.
Unknown author<span style="display: none;">Unknown author</span>
<cite style="font-style:normal">Carlo F. Chiesa (December 1998). "Le tattiche: Il Metodo, seconda parte". <i>Calcio 2000</i> (11 [14]): 120.</cite>