Other commentary on the original research article, on Scientific American:

Spark Creativity with Thomas Edison's Napping Technique - Waking yourself from the twilight state just before sleep may help you to solve a challenging problem, a study shows

https://www.scientificamerican.com/article/thomas-edisons-na...

Even better, there is an article from the very original research coordinator Delphine Oudiette on The Conversation [Fra]

https://theconversation.com/pour-doper-votre-creativite-fait...

which, miraculously - since a dozen online magazines commented on this but never linked it (?! !!! !) -, contains the link to the original research article,

https://www.sciencedirect.com/science/article/abs/pii/S10870...