This appears to be the academic article https://www.cambridge.org/core/journals/antiquity/article/what-caused-the-viking-age/9AAD157E488AF39555B64D3529944D43 ht

This appears to be the academic article https://www.cambridge.org/core/journals/antiquity/article/what-caused-the-viking-age/9AAD157E488AF39555B64D3529944D43 https://www.cambridge.org/core/journals/antiquity/article/wh... Note that it is a review of sorts, in turn referring to several other sources on the topic of selective female infanticide and skewed demographics with regard to sex. It also raises several other theories for discussion about causes for the Viking Age. Since some people commenting here appear to do so based in the impression that women forcibly kidnapped from foreign populations would become the wives, also note that the main idea suggested is acquiring wealth and social standing to compete for the shortage of eligible wives in their own culture.