@article { 84,
	title = {Three-dimensional construction with mobile robots and modular blocks},
	journal = {International Journal of Robotics Research},
	volume = {27},
	number = {3-4},
	year = {2008},
	pages = {463-479},
	url = {files/ssr/files/ijrr08-werfel.pdf},
	author = {Werfel, Justin and Radhika Nagpal}
}
