Found some great articles covering the basics:

Change Management  What exactly is change management? Learn what this broad term means, and about some of the tools and techniques to help you manage change successfully in your project.

Lewin’s Change Management Model  Lewin’s Change Management Model is known as Unfreeze – Change – Refreeze, which refers to the three-stage change process of change he describes.

The ADKAR® Change Management Model  Learn how to use this goal-oriented model to help focus your actions at each stage of a change project.

How Good Are Your Change Management Skills?  Do you know how to plan and implement change effectively? Take our quiz to find out which change management skills you need to develop.

Kotter’s 8-Step Change Model  Impatience can often undermine the change process. Learn how to prepare for change thoroughly, and implement change powerfully and successfully.