@article{oai:fun.repo.nii.ac.jp:00003828,
 author = {Oomiya, Kenta and Nakamura, Keisuke and Suzuki, Keiji},
 issue = {3},
 journal = {Journal of Artificial Life and Robotics},
 month = {Mar},
 pages = {367--370},
 title = {Evolutionary acquisition of behavior to build structural objects by virtual creatures},
 volume = {14},
 year = {2009}
}