@article{ZNSL_2022_517_a7,
     author = {P. Nikitin and N. Safonkin},
     title = {Semifinite harmonic functions on the direct product of graded graphs},
     journal = {Zapiski Nauchnykh Seminarov POMI},
     pages = {125--150},
     publisher = {mathdoc},
     volume = {517},
     year = {2022},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/ZNSL_2022_517_a7/}
}