Pfeifer, Livia; Horn, Andrea B; Maercker, Andreas; Forstmeier, Simon (2017). Caregiver perception of apathy in persons with mild cognitive impairment or Alzheimer's disease: a longitudinal study. Aging & Mental Health, 21(5):494-500.
Pfeifer, Livia. Discrepancies between patient and caregiver apathy ratings in mild Alzheimer's disease. 2015, University of Zurich, Faculty of Arts.
Pfeifer, Livia; Drobetz, Reinhard; Fankhauser, Sonja; Mortby, Moyra E; Maercker, Andreas; Forstmeier, Simon (2013). Caregiver rating bias in mild cognitive impairment and mild Alzheimer's disease: impact of caregiver burden and depression on dyadic rating discrepancy across domains. International Psychogeriatrics, 25(08):1345-1355.