@article{Karpenko:2006:S3F,
author = "Olga A. Karpenko and John F. Hughes",
title = "SmoothSketch: 3D free-form shapes from complex sketches",
year = "2006",
month = jul,
journal = "ACM Transactions on Graphics",
volume = "25",
number = "3",
pages = "589--598",
}