Effort invested in vain : The impact of effort on the intensity of disappointment and regret

Emotional reactions to the outcomes of decision : The role of counterfactual thought in the experience of regret

Zeelenberg, M., (1998)

Affect, attitudes and decisions : Let's be more specific

van der Pligt, J., (1998)

Not having what you want versus having what you don't want : The impact of the type of negative outcome on the experience of disappointment and related emotions

van Dijk, W.W., (1999)