We found a matchYour institution may have access to this item. Find your institution then sign in to continue.TitleSystems biology. Life's complexity pyramid.AuthorsOltvai, Zoltán N; Barabási, Albert-LászlóPublicationScience (New York, N.Y.), 2002, Vol 298, Issue 5594, p763ISSN1095-9203Publication typeJournal ArticleDOI10.1126/science.1078563