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This article reveals the scientific productivity of authors in the field of open education resources literature and the applicability of Lotka's law in the literature of open education resources for a given data set. Data was retrieved from the WoS database for this study, and a total of 5075 documents were published by 1126 authors in 2011-2020.Goodness of fit test - Kolmogorov-Smirnov (K-S) test was also used to measure the practicability of Lotka’s law in the field of OER open educational resources. The productivity distribution does not fit when Lotka’s law is used applied in generalized form and in its original form in the data set. This confirms that Lotka’s law doesn’t fit to the literature of open educational resources (OER).