Kings, Clients and Satellites in the Napoleonic Imperium Frederick C. SchneidJournal of Strategic Studies, 2008, 31:4, 571-604https://dl1.cuni.cz/pluginfile.php/874847/mod_resource/content/1/Schneid-2008.pdf
And there is this one, which was one of my textbooks in college:
Napoleon's Satellite Kingdoms: Managing Conquered People: Connelly, Owen: 9780894644160: Amazon.com: Books
'...a feast for the specialist, yet it is written well and carefully enough to be attractive even to the novice...this review cannot adequately indicate the wealth of information and thought-provoking interpretation in the volume.'-American Historical Review.
'...a splendid job...In capsule form are summarized and compared materials that normally have to be hunted down piecemeal in assorted references...Connelly has consulted the standard printed sources in six languages. He has missed little...'-French Review.
Anything by Rick Schneid is well-worth reading.