On Reduction Systems Equivalent to the Non-associative Lambek Calculus with the Empty String.

Wojciech Zielonka On Reduction Systems Equivalent to the Non-associative Lambek Calculus with the Empty String. 299-310 2007 17 J. Log. Comput. 2 http://dx.doi.org/10.1093/logcom/exl041 db/journals/logcom/logcom17.html#Zielonka07