Przybylski, M., and P. Cichocki. “Innovative Realization of Quantitative Goals in BDI Agents via Partial Utility Functions”. Studia Informatica. System and Information Technology, vol. 7, no. 1-2, Dec. 2006, pp. 105-16, https://czasopisma.uph.edu.pl/studiainformatica/article/view/2854.