http://www.foodferret.com/#ttl=%2BWhole%20%2Bwheat%20%2Bbread&m=normal&n2131-sourdough%20starter=on&n94-yeast=on&x322-baking%20soda=on... [1]

The site above allows you to search recipes for any word combination, also to include and exclude ingredients.

The page I linked to is a search for whole wheat + bread, included sourdough starter and yeast, a couple of items excluded. You can easily exclude by clicking on (exc) next to the listed ingredients.