@article{JSFU_2019_12_5_a2,
     author = {Sreelatha Chandragiri},
     title = {Difference equations and generating functions for some lattice path problems},
     journal = {\v{Z}urnal Sibirskogo federalʹnogo universiteta. Matematika i fizika},
     pages = {551--559},
     publisher = {mathdoc},
     volume = {12},
     number = {5},
     year = {2019},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/JSFU_2019_12_5_a2/}
}