Доступные ссылки:

Harvard: Herrmann, H., Kasepõld, K., Zaitseva-Pärnaste, I., Pastorelli, E.& Didenkulova, I. I. 2015. Photogrammetry based methodology for construction of a first reference 3D model of Pakri Cliff for future monitoring of coastal changes and hazard assessment for Pakri lighthouse. Baltic Horizons, vol. 19, pp. 19