Open book exam: A method to assess learning outcomes

"In an open book exam you are evaluated on understanding rather than recall and memorization." Source

HOW TO MAXIMISE PERFORMANCE IN OBEs, Centre for Development of Teaching & Learning, Singapore

Evan Golub, PCs in the Classroom & Open Book Exams
"What are the motivations behind giving an open-book/open-notes exam? Does giving free access to all of the resources of the Internet conflict with these motivations?" source

Richard Brightwell1, Ms Janine-Helen Danie, and Dr Angus Stewart, Evaluation: is an open book examination easier? source