.creditos {  font-family: Arial, Helvetica, sans-serif; font-size: 9px; font-weight: bold; color: #666666; text-align: centre}
.texto {  font-family: Arial, Helvetica, sans-serif; font-size: 12px; font-weight: normal; color: #333333}
.formul {  font-family: Arial, Helvetica, sans-serif; font-size: 18px; font-style: italic; font-weight: bold; border-style: none; text-align: centre}