Knowledge retention with e-Learning in corporate environment (Adult education)

I need a research paper on the topic of knowledge management focusing on e-Learning.
The topic should be around the efficacy of e-Learning content in actual knowledge retention and building new skills:
– Does self-learning increase motivation and effective learning?
– Which methods should be used when creating elearning courses, to maximize knowledge retention, especially in corporate environment, not schools or colleges/universities.
– How do adults retain this knowledge in the long run using only digital learning (either internal eLearning courses or while using platforms like Udemy for Business, Linkedin Learning, etc.)

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