Kuhlthau improved library services to students. However, this model should help graduate and post-graduate students understand how they research. I have used this process Guided Inquiry Design Process Model
Nudging Toward Inquiry - a series of articles and a magazine column that give school librarians concrete ideas to assist teachers in inquiry-based learning. This PDF is a feature article that does not contain all of the information of the other columns, which can easily be found searching for the term "Nudging toward inquiry". I found the best results in ProQuest Education.