Gehman, J., Glaser, V. L., Eisenhardt, K. M., Gioia, D., Langley, A., & Corley, K. G. (2017). Finding theory–method fit: A comparison of three qualitative approaches to theory building. Journal of Management Inquiry, 27(3) 284-300.
Carefully read Gehman et al. (2017) and explain what are differences between Langley, Eisenhardt and Gioia in their methodological approaches to grounded theory research.