Juraj Hromkovic. Hierarchy of reversal bounded one-way multicounter machines. Kybernetika, 22(2):200-206, 1986. [doi]
@article{Hromkovic86-0, title = {Hierarchy of reversal bounded one-way multicounter machines}, author = {Juraj Hromkovic}, year = {1986}, url = {http://www.kybernetika.cz/content/1986/2/200}, researchr = {https://researchr.org/publication/Hromkovic86-0}, cites = {0}, citedby = {0}, journal = {Kybernetika}, volume = {22}, number = {2}, pages = {200-206}, }