DiTrapani J, Rockwood N, Jeon M. Explanatory IRT analysis using the SPIRT macro in SPSS. TQMP. 2018;14(2):81-98. doi: 10.20982/tqmp.14.2.p081
Ribeiro-Oliveira Jr A, Mol SS, Twiss J, Alencar GA, Miranda PA, Naves LA, Azevedo MF, Basilio FM, Boguszewski CL, Nogueira KC, Vilar L, Koltowska-Haggstrom M, McKenna SP. The brazilian version of the Quality of Life Assessment of Growth Hormone Deficiency in Adults (QoL-AGHDA): four-stage translation and validation. Arq Bras Endocrinol Metabol. 2010 Dec;54(9):833-41.