For those interested in technical information on bicycles and all other forms of human powered vehicles, here is a link to an excellent resource. It is the downloads page for the journal Human Power from the International Human Powered Vehicles Association or IHPVA.
Some IGH information plus a lot of material on many aspects of bicycling science, much recumbent oriented. A index to all issues available for download is also downloadable. An excellent resource site and many articles include lists of references to earlier information.