Weltkrieg in Deutsch-Südwestafrika 1914/15, Windhoek/Namibia 2012, ISBN 978-99916-872-3-0==External links==*Chronology of Events in the Defense of the Portuguese African Colonies, 1914 - 1920 (in Portuguese)* German border incursions into Portuguese Angola prior to the First World War by Paul Southern, 2007 (requires subscription)
* Chronology of Events in the Defense of the Portuguese African Colonies, 1914—1920* German border incursions into Portuguese Angola prior to the First World War by Paul Southern, 2007 (requires subscription)