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Contains fulltext : 41723.pdf (publisher's version ) (Closed access)Pittsburgh PA,...
Contains fulltext : 43506.pdf (author's version ) (Open Access
Contains fulltext : 76247.pdf (author's version ) (Open Access
Contains fulltext : 76198.pdf (author's version ) (Open Access)9 p
Contains fulltext : 60789.pdf (author's version ) (Open Access)4 p
Contains fulltext : 140641.pdf (author's version ) (Open Access)16 p
Contains fulltext : 85912.pdf (publisher's version ) (Open Access)15 november 2010...
Contains fulltext : 101774.pdf (publisher's version ) (Closed access)20 p
Contains fulltext : 75065.pdf (author's version ) (Open Access)14 september 200
Contains fulltext : 86181.pdf (publisher's version ) (Open Access
Contains fulltext : 76241.pdf (author's version ) (Open Access