http://www.cgsc.edu/CARL/nafziger/808KBJ.pdf
http://www.cgsc.edu/CARL/nafziger/807ESAA.pdf
http://www.cgsc.edu/CARL/nafziger/808JSCQ.pdf
http://www.cgsc.edu/CARL/nafziger/808JSDD.pdf
http://www.cgsc.edu/CARL/nafziger/808DBI.pdf
http://www.napoleon-series.org/military/organization/Spain/c_Suhrspanish.html
http://www.napoleon-series.org/research/biographies/c_romana.html
http://www.roskildemuseum.dk/vores-viden/nyere-tid/da-spaniolerne-kom.aspx
(There's also an English language .pdf on this from the above museum, but its a download and I can't find a url for it. Just put in "Da spaniolerne kom - et kulturmřde i 1808" in Google and it should come up.)
http://diginole.lib.fsu.edu/cgi/viewcontent.cgi?article=4433&context=etd
Les Espagnols a la Grande-Armée: le corps de la Romana (1807-1808)
Paul Louis Hippolyte Boppe
Berger-Levrault, 1899
En Danemark: Les Espagnols du Marquis de la Romana. 1807-1808
Simón Godchot
A. Picard, 1924
EL MARQUES DE LA ROMANA Y EL MARISCAL BERNADOTTE: LA EPOPEYA SING ULAR DE LA DIVISION DEL NORTE EN DINAMARCA (1808)
Morner, Magnus
Centro De Estudios Constitucionales, 2004