Di Gravio, G., Patriarca, R., Costantino, F. and Sikora, I. 2017. Safety Assessment for an ATM System Change: A Methodology for the ANSPs. Promet - Traffic&Transportation. 29, 1 (Feb. 2017), 99-107. DOI:https://doi.org/10.7307/ptt.v29i1.2121.