https://www.discogs.com/es/release/2068716-Ramleh-Hole-In-The-Heart
-Power electronics and noise rock band sporadically operating from the early eighties to the present day.
https://www.discogs.com/es/release/9513564-SPK-From-Science-To-Ritual
-Australian industrial band formed in 1978 in Sydney.
Official name variation only used in print (SPK's own 'Dokument' fanzine): Selective Pornographi Kontrol