@article{VMUMM_2018_1_a8,
     author = {Ya. I. Petrukhin},
     title = {Natural deduction systems for the three-valued nonsense logics $\mathbf{Z}$ and $\mathbf{E}$},
     journal = {Vestnik Moskovskogo universiteta. Matematika, mehanika},
     pages = {60--63},
     publisher = {mathdoc},
     number = {1},
     year = {2018},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/VMUMM_2018_1_a8/}
}