From Open Babel
@Article{fig96,
author = {J. Figueras},
title = {{R}ing {P}erception {U}sing {B}readth--{F}irst {S}earch},
journal = {J. Chem. Inf. Comput. Sci.},
year = {1996},
volume = {36},
pages = {986-991},
abstract = {Combining breadth-first search with new ideas for uncovering embedded
rings in complex systems 1 yields a very fast routine for ring perception.
With large structures, the new routine is orders of magnitude faster
than depth-first ring detection, a result expected on the basis
of recent work that establishes polynomial order for BFS.2},
contents = {Smallest Set of Smallest Ring (SSSR), Bread First Search (BFS), Binary
Edge Encoded Path (BEEP), message passing algorithm},
topics = {Smallest Set of Smallest Ring (SSSR), Bread First Search (BFS), Binary
Edge Encoded Path (BEEP), message passing algorithm},
}