Sokołowska, Ewelina, and Jerzy Wiśniewski. “Liquidity Management by Effective Debt Collection: A Statistical Analysis in a Small Industrial Enterprise”. Ekonomika 94, no. 1 (March 31, 2015): 143–156. Accessed October 20, 2025. https://www.zurnalai.vu.lt/ekonomika/article/view/5325.