TY - JOUR VL - 38 JF - The European Physical Journal B - Condensed Matter IS - 2 Y1 - 2004/02// SP - 183 PB - Springer-Verlag A1 - Caldarelli, Guido A1 - Pastor-Satorras, Romualdo A1 - Vespignani, Alessandro EP - 186 ID - eprints1127 UR - http://dx.doi.org/10.1140/epjb/e2004-00020-6 KW - PACS: 89.75.-k Complex systems - 89.75.Fb Structures and organization in complex systems TI - Structure of cycles and local ordering in complex networks AV - none N2 - We study the properties of quantities aimed at the characterization of grid-like ordering in complex networks. These quantities are based on the global and local behavior of cycles of order four, which are the minimal structures able to identify rectangular clustering. The analysis of data from real networks reveals the ubiquitous presence of a statistically high level of grid-like ordering that is non-trivially correlated with the local degree properties. These observations provide new insights on the hierarchical structure of complex networks. SN - 1434-6028 ER -