References
Arthur R. Luther
(1974)., The articulated unity of being in Scheler's phenomenology. basic drive and spirit, in M. S. Frings (ed.), Max Scheler (1874–1928) centennial essays, Dordrecht, Springer, pp. 1-42.
(1972). Persons in love: a study of Max Scheler's Wesen und Formen der Sympathie, Springer, Dordrecht.