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Published online by Cambridge University Press: 03 August 2017
It is generally accepted that mass loss and overshooting are the two main processes that play important roles in the formation of Wolf-Rayet stars (Chiosi & Maeder, 1986). Such mechanisms modify the interior of a star. We cannot, however, disregard the possibility that there are external factors, which can influence the formation and evolution of Wolf-Rayet stars.