Chirosca, A. M., and L. Rusu. “Statistical and Economic Analysis of the Rhine-Main-Danube Canal, the Bridge Between the North Sea and the Black Sea: Array”. Journal of Danubian Studies and Research, vol. 11, no. 1, Sept. 2021, https://dj.univ-danubius.ro/index.php/JDSR/article/view/1288.