Adam Roberts (Adam Charles): The History of Science Fiction (= Palgrave Histories of Literature). Palgrave Macmillan UK, Basingstoke [England] 2006, ISBN 978-0-333-97022-5, S.195, doi:10.1057/9780230554658: „… linear narratives, heroes solving problems or countering threats in a space-opera or technological-adventure idiom“
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Jeff Prucher: Brave Worlds: The Oxford Dictionary of Science Fiction. Oxford University Press, 2007, S. 205
Le Zombie, Nr. 36, Januar 1941. Zitat, ungezählte Seite 7: In these hectic days of phrase-coining, we offer one. Westerns are called „horse operas“, the morning housewife tear-jerkers are called „soap-peras“. For the hacky, grinding, stinking, outworn space-ship yarn, or world-saving for that matter, we offer „space opera“.
