Lamani, Luis. “An Assessment in Terms of Investment Efficiency in an Informal Economy. A Case Study With 30 Years Biased Data from Albanian Forex Market”. IETI Transactions on Data Analysis and Forecasting (iTDAF), vol. 1, no. 3, Nov. 2023, pp. pp. 46-60, doi:10.3991/itdaf.v1i3.40193.