@article{li2011a, author = {Li, Xian-Ying and Ju, Tao and Gu, Yan and Hu, Shi-Min}, title = {A Geometric Study of V-style Pop-ups: Theories and Algorithms}, journal = {ACM Transactions on Graphics}, year = {2011}, volume = {30}, number = {4}, pages = {98:1--10}, }