Mordin M, Anastassopoulos K, van Breda A, Vallow S, Zhang M, Gargiulo K, Hewitt D, Olson W, Sikirica V. Clinical staff resource use with intravenous patient-controlled analgesia in acute postoperative pain management: results from a multicenter, prospective, observational study. J Perianesth Nurs. 2007 Aug 1;22(4):243-55.
Scrams DJ, McLeod LD. An expected response function approach to graphical differential item functioning. J Educ Meas. 2000 Jan 1;37(3):263-77.
Williams VSL, Rosa KR, McLeod L, Thissen D, Sanford EE. Projecting to the NAEP Scale: results from the North Carolina End‐of‐Grade Testing Program. J Educ Meas. 1998 Dec;35(4):277-96. doi: 10.1111/j.1745-3984.1998.tb00539.x
Williams VSL, Pommerich M, Thissen D. A comparison of developmental scales based on Thurstone methods and item response theory. J Educ Meas. 1998 Jun;35(2):93-107.