@articleKlingsieck_2013, title=Procrastination, DOI=10.1027/1016-9040/a000138, journal=European Psychologist, author=Klingsieck, Katrin B., year=2013, pages=24–34 

@articleKlingsieck_2013, title=Procrastination: When Good Things Don’t Come to Those Who Wait, volume=18, DOI=10.1027/1016-9040/a000138, number=1, journal=European Psychologist, publisher=Hogrefe Publishing Group, author=Klingsieck, Katrin B., year=2013, pages=24–34