Vukić, L., L. Runko Luttenberger, K. Balić, and M. Slišković. “External Costs on The Island of Vis: Comparison of Two Traffic Modes”. Transactions on Maritime Science, vol. 8, no. 2, Oct. 2019, pp. 230 -34, doi:10.7225/toms.v08.n02.008.