Theoretical approaches, societal issues, and practical implications for school-based and extracurricular talent development: Outcomes of the Inaugural European-North American Summit on Talent Development (part I) [Special Issue] - Stöger, Heidrun; Olszewski-Kubilius, P; Subotnik, R F; Assouline, S; McCouach, D B; Ziegler, Albert (Gifted child quarterly, 2017)