According to a bibliographic analysis published in the Journal of Engineering and Technology Management, Prof. Dr. Oliver Gassmann has been ranked in the top 10. The study draws upon data spanning 20 years of research on innovation and new product development published in technology and innovation management (TIM) journals.

Here is a link to this study:

https://www.sciencedirect.com/science/article/pii/S0923474821000217?via%3Dihub