@article{10_1017_S0017089505002247,
     author = {AGAFONOV, S. I.},
     title = {DISCRETE {RICCATI} {EQUATION,} {HYPERGEOMETRIC} {FUNCTIONS} {AND} {CIRCLE} {PATTERNS} {OF} {SCHRAMM} {TYPE}},
     journal = {Glasgow mathematical journal},
     pages = {1--16},
     year = {2005},
     volume = {47},
     number = {A},
     doi = {10.1017/S0017089505002247},
     url = {http://geodesic.mathdoc.fr/articles/10.1017/S0017089505002247/}
}