Elmborg, J. K. (2002). Teaching at the desk: Toward a reference pedagogy. portal: Libraries and the Academy, 2(3): 455-464. doi:10.1353/pla.2002.0050
Elmborg describes how one-on-one interactions with students at the reference desk can model the writing conference and use socratic-style questioning to lead students to finding their own answers to reference questions, learning valuable information literacy skills in the process, instead of simply giving them the answer or a list of best sources.
As a teacher librarian, I found this source to be a practical tool to take advantage of reference questions as teachable moments.