AIRBUS has printed a ton of white papers on "their" version - Author Curt Chenoweth - father of the 757 FBW spoilers & contributor to just about every Boeing fbw military airplane ( IE C-17 FBW etc. ) wrote a book that is now out of print that is absolutely fabulous - very technical - but a light read - try & order it on AMAZON as a used publication. A great survey on High lift system is written by Peter Rudolph - was a NASA pub ./.