%0 Journal Article %T Modeling and analysis of effective factors in the outsourcing of R&D projects by SEM and ISM approaches: A case study of "Iranian aviation industries organization" %A TAGHIZADEH, G. %A TORABI, H. %A RAJABZADEH, M. %J Sigma Journal of Engineering and Natural Sciences %D 2022 %V 40 %P 196-207 %R 10.14744/sigma.2022.00016