@article{SIGMA_2021_17_a97,
     author = {Asena \c{C}etinkaya and Dmitrii Karp and Elena Prilepkina},
     title = {Hypergeometric {Functions} at {Unit} {Argument:} {Simple} {Derivation} of {Old} and {New} {Identities}},
     journal = {Symmetry, integrability and geometry: methods and applications},
     year = {2021},
     volume = {17},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/SIGMA_2021_17_a97/}
}