1. Agresti, A. (2013). An introduction to categorical data analysis (3rd ed.). New York: Wiley.
2. Beebee, H., Hitchcock, C., & Menzies, P. (Eds.). (2009). The Oxford handbook of causation. New York: Oxford University Press.
3. Bollen, K. A. (1989). Structural equations with latent variables. New York: Wiley.
4. Darlington, R. B., & Hayes, A. F. (2000). Combining independent p values: extensions of the Stouffer and binomial methods. Psychological Methods, 5, 496–515.
5. Dodge, Y., & Rousson, V. (2000). Direction dependence in a regression line. Communications in Statistics - Theory and Methods, 32, 2053–2057.