I've never seen any articles on this, but I have a couple of projects in the book I'm writing on designing your own cotton knits that uses it to embellish the pieces! And here I thought I invented it!!!
Oh, well, nothing new under the sun I guess!!!
I can tell you that it's easy and fast. Just put your crochet hook through the bottom of a stitch and pull up a loop. Put the needle back through the knitted cloth at the top of the first stitch and pull up a loop through the first chain stitch. If you're working vertically just go on up the line. (It looks like a duplicate stitch, only easier to do!) When you get to the end of the row, snip the yarn and pull it through the top of the last stitch and tie off on the back.
I hope this makes sense. If you need more info, let me know and as soon as I have those patterns for the book written up I'll send the technique sheet along to you.
Meanwhile, happy knitting!