From 1991 to date, more than 20 years, Giampaolo Perna has dedicated time and effort to research publishing on the most important international scientific journals both as the principal investigator and as a co-investigator. In his researches ho collaborated with several national and international institutions, showing good leadership qualities and the adaptability to be a coworker. The number of international publications indexed in MedLine or Journal of Citation Report become more than 195, with more than 1300 Globalf Impact Factor and una H-Index of 52/42 (Google Scholar/Scopus).