“Introduction.” Notes on Crystalline Cohomology. (MN-21), by Pierre Berthelot and Arthur Ogus, Princeton University Press, Princeton, New Jersey, 1978, pp. 1.1–1.14, www.jstor.org/stable/j.ctt130hk6f.4. Accessed 24 July 2021.
Berthelot, P., & Ogus, A. (1978). Introduction. In Notes on Crystalline Cohomology. (MN-21) (pp. 1.1-1.14). Princeton, New Jersey: Princeton University Press. Retrieved July 24, 2021, from http://www.jstor.org/stable/j.ctt130hk6f.4
Berthelot, Pierre, and Arthur Ogus. "Introduction." In Notes on Crystalline Cohomology. (MN-21), 1.1-.14. Princeton, New Jersey: Princeton University Press, 1978. Accessed July 24, 2021. http://www.jstor.org/stable/j.ctt130hk6f.4.
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