[daveFNbuck]

That mentions (without citation) one study about a very extreme and weird version of catching up on sleep. I doubt this person was talking about sleeping an extra 10 hours in one night to make up for 28 hours of missed sleep over 2 weeks.

[vienno]

I can't seem to recall where I first read this, but I am confident I've read it in multiple articles and books (I have a keen interest in this topic due to serious personal sleep issues).

But I seem to stand corrected[1]. Thanks for your comment.

1. http://time.com/5288704/can-you-catch-up-on-sleep/