@article{TOG8410472,
	author = {M. J. B. Stephenson and J. Renz and X. Ge and P. Zhang},
	title = {Generating Stable, Building Block Structures from Sketches},
	journal = {IEEE Transactions on Games},
	series = {TOG},
	year = {2019},
	volume = {}, 
	number = {}, 
	pages = {1-11}, 
	keywords = {Shape;Games;Birds;Two dimensional displays;Generators;Physics;Stability criteria}, 
	doi={10.1109/TG.2019.2908353}, 
	ISSN={2475-1502}, 
	url = {https://ieeexplore.ieee.org/document/8678471}
}