Planning and problem-solving training for patients with schizophrenia: a randomized controlled trial - Rodewald, Katlehn; Rentrop, Mirjam; Holt, Daniel; Roesch-Ely, Daniela; Backenstraß, Matthias; Funke, Joachim; Weisbrod, Matthias; Kaiser, Stefan (BMC psychiatry, 2011)