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Lua i Stíl Chicago (17ú heag.)Espitia-López, Jairo Martín, Ana Carolina Ramírez-Ruiz, agus José Rodrigo Méndez-Zuluaga. Physical Modelling in Reduced Dimensions of Contention Walls Made of Reinforced Earth by Geo-textile. Universidad Pedagógica y Tecnológica de Colombia - UPTC, 2007.
Lua MLA (9ú heag.)Espitia-López, Jairo Martín, et al. Physical Modelling in Reduced Dimensions of Contention Walls Made of Reinforced Earth by Geo-textile. Universidad Pedagógica y Tecnológica de Colombia - UPTC, 2007.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.
