LaPaugh, Andrea S.; Rivest, Ronald L. (1980). «The subgraph homeomorphism problem». Journal of Computer and System Sciences20 (2): 133–149. doi:10.1016/0022-0000(80)90057-4.
LaPaugh, Andrea S.; Rivest, Ronald L. (1980). «The subgraph homeomorphism problem». Journal of Computer and System Sciences20 (2): 133–149. doi:10.1016/0022-0000(80)90057-4.