@ARTICLE{a2018,
     Title={A modified butterfly optimization algorithm for mechanical design optimization problems},
     Author={Arora, Sankalap and Singh, Satvir and Yetilmezsoy, Kaan},
     Journal={Journal of the Brazilian Society of Mechanical Sciences and Engineering},
     Volume={40},
     Number={21},
     Pages={1-17},
     Publisher={Springer Berlin Heidelberg},
     Year={2018}
}