“Life-reformation Movements at the Beginning of the 20th Century and the Puppet World of the Third Cycle of Reformation Pedagogy: The Käthe Kruse and Waldorf Puppets”, trainingandpractice, vol. 13, no. 1-2, pp. 349–357, Jun. 2015, doi: 10.17165/TP.2015.1-2.24.