"In memoria di Roberto Peccei". Greenreport: economia ecologica e sviluppo sostenibile (in Italian). 2020-06-04. Archived from the original on 2020-06-05. Retrieved 2020-06-05.
"In memoria di Roberto Peccei". Greenreport: economia ecologica e sviluppo sostenibile (in Italian). 2020-06-04. Archived from the original on 2020-06-05. Retrieved 2020-06-05.