It is permitted to reproduce, distribute and communicate to the public a published work for the purpose of quotation insofar as such use is justified to that extent by the particular purpose. This is, in particular, permitted where
1. subsequent to publication individual works are included in an independent scientific work for the purpose of explaining its content,
2. subsequent to publication passages from a work are quoted in an independent literary work,
3. individual passages from a released musical work are quoted in an independent musical work.
The authorisation to quote under sentences 1 and 2 includes the use of an illustration or other reproduction of the cited work, even if this is itself protected by copyright or a related right.