Reference health
Distinctive Roles of Lead Users and Opinion Leaders in the Social Networks of Schoolchildren
4 of 66 checkable references need attention · checked 2026-08-12
At the dated check, the references listed below either did not resolve in Crossref or DataCite, or carried a retraction notice. Each one is shown with the registry record that put it there.
25 without a DOI — not checked. A reference deposited without a DOI is never matched by title or guessed at; it stays outside the checked set, and this line discloses that.
References needing attention
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The 62 checked references that resolve
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Exploring How Lead Users Develop Radical Innovation: Opportunity Recognition and Exploitation in the Field of Medical Equipment Technology
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User-innovators and “local” information: The case of mountain biking
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On the Importance of Marginality: One More Step into the Two-Step Flow of Communication
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no DOI — not checkedBrass Daniel J. Burkhardt Marlene E. (1992), “Centrality and Power in Organizations,” in Networks and Organizations, ed. Nohria Nitin Eccles Robert G. , Cambridge, MA: Harvard Business School Press, 127–68.
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no DOI — not checkedBurt Ronald S. (1992), Structural Holes: The Social Structure of Competition, Cambridge, MA: Harvard University Press.
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no DOI — not checkedColeman James S. Katz Elihu Menzel Herbert (1966), Medical Innovation: A Diffusion Study, New York: Bobbs Merrill.
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no DOI — not checkedMcNeal James U. (1992), Kids as Consumers, New York: Lexington.
no DOI — not checkedPiaget Jean (1971), Psychology and Epistemology: Towards a Theory of Knowledge, New York: Viking.
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no DOI — not checkedUlrich Karl T. Eppinger Steven D. (2000), Product Design and Development, 2nd ed., New York: McGraw Hill.
no DOI — not checkedWassermann Stanley Faust Katherine (1994), Social Network Analysis, New York: Cambridge University Press.
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