Charlesworth, G;    Greenfield, S;      (2004)    Overcoming barriers to collaborative conceptualization in cognitive therapy with older adults.                   Behavioural and Cognitive Psychotherapy , 32  (4)   411 - 422.    10.1017/S1352465804001699 <https://doi.org/10.1017/S1352465804001699>.       Green open access