@article{paperid:1038784, author = {Mohammad Ghodsi and Anil Maheshwari and Nouri Baygi, Mostafa and Jörg-Rüdiger Sack and Hamid Zarrabi-Zadeha}, title = {α-Visibility}, journal = {Computational Geometry}, year = {2014}, volume = {47}, number = {3}, month = {April}, issn = {0925-7721}, pages = {435--446}, numpages = {11}, keywords = {Visibility; Approximate visibility; Shortest paths; Weak visibility; Visibility queries}, }