@article{ZNSL_1969_16_a3,
     author = {Ya. Ya. Golota},
     title = {Nets of marks and deducibility in intuitionistic propositional calculus},
     journal = {Zapiski Nauchnykh Seminarov POMI},
     pages = {28--43},
     publisher = {mathdoc},
     volume = {16},
     year = {1969},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/ZNSL_1969_16_a3/}
}