Piotr Cholda Anders Mykkeltveit Bjarne E. Helvik Otto Wittner Andrzej Jajszczyk A survey of resilience differentiation frameworks in communication networks. 32-55 2007 9 IEEE Communications Surveys and Tutorials 1-4 http://dl.comsoc.org/cocoon/comsoc/servlets/OntologySearch?query=&node=TOC1908&render=false&type=1 db/journals/comsur/comsur9.html#CholdaMHWJ07