Two-way imputation: A Bayesian method for estimating missing scores in tests and questionnaires, and an accurate approximation. - Joost R. Van Ginkel; L. Andries Van der Ark; Klaas Sijtsma; Jeroen K. Vermunt (Comput. Stat. Data Anal., 2007)

Comparing Optimization Algorithms for Item Selection in Mokken Scale Analysis. - J. Hendrik Straat; L. Andries Van der Ark; Klaas Sijtsma (J. Classif., 2013)

Measuring cyber secure behavior of elementary and high school students in the Netherlands. - Jacob Willem Abraham Witsenboer; Klaas Sijtsma; Fedde Scheele (Comput. Educ., 2022)

Sparsifying the least-squares approach to PCA: comparison of lasso and cardinality constraint. - Rosember Guerra-Urzola; Niek C. de Schipper; Anya Tonne; Klaas Sijtsma; Juan C. Vera 001; Katrijn Van Deun (Adv. Data Anal. Classif., 2023)