Cases to look at:
Isley versus Bolton (Substantially similar copy)
https://www.quimbee.com/cases/three-boys-music-corp-v-michael-bolton
http://www.invispress.com/law/copyright/bolton.html
Selle v. Gibb (Striking Similarities)
Cases to look at:
Isley versus Bolton (Substantially similar copy)
https://www.quimbee.com/cases/three-boys-music-corp-v-michael-bolton
http://www.invispress.com/law/copyright/bolton.html
Selle v. Gibb (Striking Similarities)