Nieri, A.-S. Manousaki, K. Kalafati, M. Padilha, K.G. Stafseth, S.K. Katsoulas, T. Matziou, V. Giannakopoulou, M., Validation of the nursing workload scoring systems “Nursing Activities Score” (NAS), and “Therapeutic Intervention Scoring System for Critically Ill Children” (TISS-C) in a Greek Paediatric Intensive Care Unit, Intensive and Critical Care Nursing, (48), 3-9, 2018, Churchill Livingstone, 0964-3397