Save the Stitches is the excellent blog from Nordic Needle. I love that it has detailed articles on many types of embroidery. You”l find lots of great information in it.
A recent article covered tassels. I’m sure you know what they are and even have made one or two.
You’ll find tons of information here including lots of historic background, the anatomy of a tassel and resources for making them.
It’s a wonderfukl portal into an exciting world.