Gibson, Valerie; Jardine-Wright, Lisa; Bateman, Elizabeth (1 July 2015). "An investigation into the impact of question structure on the performance of first year physics undergraduate students at the University of Cambridge". European Journal of Physics36 (4): 045014. doi:10.1088/0143-0807/36/4/045014. Bibcode: 2015EJPh...36d5014G.
Gibson, Valerie; Jardine-Wright, Lisa; Bateman, Elizabeth (1 July 2015). "An investigation into the impact of question structure on the performance of first year physics undergraduate students at the University of Cambridge". European Journal of Physics36 (4): 045014. doi:10.1088/0143-0807/36/4/045014. Bibcode: 2015EJPh...36d5014G.