[Air-l] Stratification in social networks

Hello everybody! Does anybody know any articles, papers etc. about social networks, where the stratification is the main topic? All my search in Google, Jstor, SAGE, AoIR archieves etc. brought me papers which mention stratification only slightly but I want something more specific on this topic. Thanks in advance. Alexander Semenov. MA student Faculty of Sociology Moscow School of Social and Economic Sciences (MSSES) http://www.msses.ru/English/index.html