@article{Fister2016ParameterTuningPI,
 author = {Fister, Dusan and Safari{\v{c}}, Riko and Fister Jr., Iztok and Fister, Iztok},
 journal = {Informatica},
 number = {1},
 pages = {109--116},
 title = {Parameter tuning of PI-controller with Bat algorithm},
 volume = {40},
 year = {2016}
}