1. Lizzi, F. (1964). Root pattern piles underpinning. In Symposium on Bearing Capacity of Piles, Roorkee, India.
2. Zanetto, L. (1975). Aspetti tecnologici della costruzione dei micropali. In 6° Ciclo Annuale di Conferenze Dedicato ai Problemi di Meccanica dei Terreni, Politecnico di Torino.
3. Lizzi, F. (1976). Pieu de fondation à ‘cellule de précharge’. In Revue ‘Construction’, June 1976, Paris.
4. Lizzi, F. (1977). Practical engineering in structurally complex formations. In International Symposium on the ‘Geotechnics of Structurally Complex Formations’, Capri.
5. Lizzi, F. (1978). ‘Reticulated root piles’ to correct landslides. In ASCE Convention, October 1978, Chicago.