Currently, the citation string has a Unicode character. This works well in gem5, but it breaks the gem5+SST simulation [1]. This change modifies the letter "u" with umlaut to use TeX's escape sequence for this letter instead of using the UTF-8 character. [1] https://github.com/gem5/gem5/issues/982 Signed-off-by: Hoa Nguyen <hn@hnpl.org>