@incollection{Fister2016Parameter,
 author = {Fister Jr, Iztok and Mlakar, Uro{\v{s}} and Yang, Xin-She and Fister, Iztok},
 booktitle = {Nature-Inspired Computation in Engineering},
 pages = {267--276},
 publisher = {Springer},
 title = {Parameterless Bat Algorithm and Its Performance Study},
 year = {2016}
}