The provided document is a comprehensive study on leadership and change management models. It begins with a meta title and description for SEO purposes, followed by a list of references to relevant academic papers and books. The document then analyzes the topic in detail, exploring various models such as Lewin's Force Field Model. Case studies are also presented, including studies on leading at the top, implicit change leadership, and overcoming uncertainty in adoption of Blue-Green Infrastructure. The document concludes with a list of online resources for further study.