RT Article T1 Reflections on the paradigm shift in voluntary work, with reference to Switzerland JF Diaconia VO 2 IS 1 SP 81 OP 89 A1 Sigrist, Christoph 1963- LA English YR 2011 UL https://ixtheo.de/Record/1566006325 DO 10.13109/diac.2011.2.1.81