RUNGE, J. (1996). "Palaeoenvironmental Interpretation of Geomorphological and Pedological Studies in the Rain Forest "Core-Areas" of Eastern Zaire (Central Africa)". South African Geographical Journal. 78 (2). Informa UK Limited: 91–97. Bibcode:1996SAfGJ..78...91R. doi:10.1080/03736245.1996.9713613. ISSN0373-6245.
RUNGE, J. (1996). "Palaeoenvironmental Interpretation of Geomorphological and Pedological Studies in the Rain Forest "Core-Areas" of Eastern Zaire (Central Africa)". South African Geographical Journal. 78 (2). Informa UK Limited: 91–97. Bibcode:1996SAfGJ..78...91R. doi:10.1080/03736245.1996.9713613. ISSN0373-6245.
RUNGE, J. (1996). "Palaeoenvironmental Interpretation of Geomorphological and Pedological Studies in the Rain Forest "Core-Areas" of Eastern Zaire (Central Africa)". South African Geographical Journal. 78 (2). Informa UK Limited: 91–97. Bibcode:1996SAfGJ..78...91R. doi:10.1080/03736245.1996.9713613. ISSN0373-6245.