Tourskin I am concerned about your approach to sources  All the sources you have listed are meant to be introductions or their scope is far too vast to be useful for such a specific battle Maddens book is a good start but it is also meant to be an intro to the crusades in general it is very short and doesnt say much about Nicopolis And where are they getting their information from Have you looked for any primary sources I understand that foreign languages are a problem I cant read Turkish either but you shouldnt discount research just because it isnt in English I also wouldnt put my faith in random websites like geocities or aboutcom Its great that you are trying to help but I worry that the article might actually suffer in the end