Michael J. Brooks, Wojciech Chojnacki, Ryszard Kozera. Impossible and ambiguous shading patterns. International Journal of Computer Vision, 7(2):119-126, 1992. [doi]
@article{BrooksCK92,
title = {Impossible and ambiguous shading patterns},
author = {Michael J. Brooks and Wojciech Chojnacki and Ryszard Kozera},
year = {1992},
doi = {10.1007/BF00128131},
url = {http://dx.doi.org/10.1007/BF00128131},
researchr = {https://researchr.org/publication/BrooksCK92},
cites = {0},
citedby = {0},
journal = {International Journal of Computer Vision},
volume = {7},
number = {2},
pages = {119-126},
}