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Rainer Niekamp. «Software Component Architecture». Gestión de Congresos - CIMNE/Institute for Scientific Computing, TU Braunschweig. p. 4. Archivado desde el original el 28 de marzo de 2012. Consultado el 29 de julio de 2011. «The modern concept of a software component largely defined by Brad Cox of Stepstone, => Objective-C programming language».