Marib : Al-Dalīl Al-Sīyāḥī lil-Mawāqiʿ Al-Aṯarīyah fī Minṭaqat Maʾrib - Hitgen, Holger (Wizārat Al-Ṯaqāfah wal-Sīyāḥah bil-Ğumhūrīyah Al-Yamanīyah, 2005)