C. Schwambach, “The third way of worship in M. Luther: A protestant perspective about the place of small home groups in the Christian Church”, Vox Script. – Rev. Teol. Intern., vol. 26, no. 2, pp. 281–306, Aug. 2018, doi: 10.25188/FLT-VoxScript(eISSN2447-7443)vXXVI.n2.p281-306.CS.