VanderWeele, T. J., & Robins, J. M. (2010). Signed directed acyclic graphs for causal inference. J R Stat Soc Series B Stat Methodol.
Chicago-tyylinen lähdeviittausVanderWeele, Tyler J., ja James M. Robins. "Signed Directed Acyclic Graphs for Causal Inference." J R Stat Soc Series B Stat Methodol 2010.
MLA-viiteVanderWeele, Tyler J., ja James M. Robins. "Signed Directed Acyclic Graphs for Causal Inference." J R Stat Soc Series B Stat Methodol 2010.
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