List of the studied authors
Kovalev & Schmeleva, 1982 (p.83); Greze & al., 1985 (p.7); Razouls & al., 2000 (p.343, Appendix); Uysal & Shmeleva, 2012 (p.909, Table I); Benedetti & al., 2016 (p.159, Table I, fig.1, functional characters); Belmonte, 2018 (p.273, Table I: Italian zones)