Funded by the National Science Foundation PEET program (Partnerships for Enhancing Expertise in Taxonomy)
Mittempergher, L., A. Fagnani, and F. Ferrini. 1993. L'olmo ciliato (Ulmus laevis Pallas), un olmo europeo interessante e poco conosciuto [European white elm (Ulmus laevis Pallas): an interesting and little-known species]. Monti e Boschi 44:13-17.