@article{DBLP:journals/tcs/Wyrostek86,
author = {Piotr Wyrostek},
title = {On the Size of Unambiguous Context-Free Grammars},
journal = {Theor. Comput. Sci.},
volume = {47},
number = {3},
year = {1986},
pages = {107-110},
ee = {http://dx.doi.org/10.1016/0304-3975(86)90138-6},
bibsource = {DBLP, http://dblp.uni-trier.de}
}