@article{BSL5_2_Zielonka,
author = {Wojciech ZIELONKA},
title = {On the Equivalence of Ajdukiewicz--Lambek Calculus and Simple Phrase Structure Grammars},
journal = {Bulletin of the Section of Logic},
volume = {5},
number = {2},
year = {1976},
pages = {44--49}
}