Journal of Automata, Languages and Combinatorics formerly:
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@article{jalc160105, author = {Sherzod~Turaev and Mohd Hasan~Selamat and Mohamed~Othman}, title = {Nonterminal Complexity of Tree Controlled Grammars Generating Context-Free Languages}, journal = jalc, year = 2011, volume = 16, number = {1}, pages = {55--63} }