Torabi, Hassan, Dehghani poodeh, Hossein , Cheshmberah, Mohsen , Karimi gavareshki, Mohammad Hussein, Hosnav, Reza i. “ Determining the core capabilities of the network of collaborators in Complex Product Systems R&D outsourcing (Case study: An industrial organization).” Modiriat-e- farda, vol. 17, no. 54, 2018, pp. 57-74.