Ferraz AEP, Carvalho EC de, Gir E. Exploring the usage of terms: problem, patient problem and nursing probleem. Rev. Esc. Enferm. USP [Internet]. 1988 Jun. 1 [cited 2024 Jun. 22];22(spe):102-11. Available from: https://revistas.usp.br/reeusp/article/view/135958