Here's one- Denker on Types of Drag.

Notice that he associates form drag with induced drag because it is a type of pressure drag, and with parasite drag, which of course is the more common grouping.

Also please note that Mr. Denker's website is not peer-reviewed. It is also free, available online and without a subscription, and he is a good writer and a top scientist. I use his site for these reasons alone. But as much fun Denker may be to read, his website does not constitute peer-reviewed scholarship. We need to bear in mind that peer-reviewed textbooks used by ABET-approved colleges and universities are the best source of information and represent the accepted standard for knowledge on these topics.

This brings up a few points that seem well placed here.

One is, there should be a free-wheeling place in the world for which to discuss topics like the ones we discuss here at APC. Such places should not be held to a very high level of scholarship. One should be able to post whatever erroneous or correct impressions they happen to carry on a given topic and feel free to do so, the only restriction being a self-imposed mandate for sincerity. I have noticed a tendency for users of the Flight Training and Technical forums to enter needless contests about sources, when the standard for scholarship should already be clear to such users. Doing so they run the risk of dragging the easy, free-wheeling mood of the discussion down while making it very difficult to share ideas. We want an atmosphere of mutual respect and we want a mood of sharing to prevail. If you want 100% correct, accurate, well-studied, approved, and complete sources on a subject you do not want to be conducting your research on an internet forum. That is not to negate the value of any informal, free-wheeling, sincere discussions had at APC or any other quality internet forum.

Second, one needs to acquire their initial understanding of involved scientific topics such as these at a recognized places of learning, such as an ABET-approved universities, FAA approved flight schools, and authorized government training institutions such as the US Military. To come to APC and expect to do anything other than speak casually about a topic is not a very good idea. I admit I have not always been a perfect example of an ideal internet user, but these are the thoughts I always keep in mind when using the Flight Training and Technical forums at APC.