Below is a list in order of relevance to your search query. A 5 page paper discussing how magic is employed in the two works. No additional sources cited. A four-page paper looking at these two works from the fourteenth and sixteenth centuries, respectively. The paper shows that while both works deal with the city as a central motif, and both present cities which are imaginary and ideal, the intentions of the authors in writing their works make their presentations very different.
Bibliography lists four sources.
An 8 page discussion of the 'Song of Roland' as an example of the logical aspects of Medieval Warfare. It is noted that while the typical knight's code of honor should not be underestimated and was of great importance, so was his quest for financial rewards. Bibliography lists 5 supporting sources. Some say that courage is danger, difficulty, or pain without fear. It contains elements of will power and self-sacrifice.