 Barnard 2003; Beiser 2003; Bollacher 1994; Forster 2011b, 2012a, 2018 (ch. 8); Gadamer 1942; Irmscher 1984, 2010; Lovejoy 1948 (helpful and concise); Maurer 1987; Meinecke [1936] 1972 (ch. 9 on Herder is very helpful); Otto and Zammito 2001; Staedelmann 1928; Wells 1960; Zammito 2009.