Starting at this page you can reach several German sources.
Nun kommt der Freiheit grosser Morgen
", an article about Lortzing's "Regina", written by Jürgen Lodemann.
Indispensable for a good comprehesion of Lortzing's view on the aesthetics of opera is his
interview with Johann Christian Lobe
(1797 -1881), published in "Consonanzen und Dissonanzen", Leipzig 1869. There is also a
All articles on Lortzing as published in the "
Allgemeine Musikalische Zeitung
" are available on this website.