A sua pesquisa - communication cost based extension ((euclidean gibbs) or (euclidean rings)) - não corresponde a nenhum registo.

Talvez deva tentar algumas variações de ortografia:
communication cost » communication cross, communication case, communication control
based extension » based extraction
euclidean gibbs » euclidean graphs, euclidean logics
euclidean rings » euclidean minisum, euclidean graphs, euclidean random
cost based » forest based

Pode obter mais resultados ajustando a pesquisa.