Zellagui, M., Benabid, R., Boudour, M., Chaghi, A. “Mixed Integer Optimization of IDMT Overcurrent Relays in the Presence of Wind Energy Farms Using PSO Algorithm”, Periodica Polytechnica Electrical Engineering and Computer Science, 59(1), pp. 9–17, 2015. https://doi.org/10.3311/PPee.7525