Under siege four african cities Freetown, Johannesburg, Lagos, Kinshasa ; Documenta11_Platform4 , [this volume contains all contributions to Documenta11_Platform4, "Under Siege: Four African Cities - Freetown, Johannesburg, Kinshasa, Lagos", a conference and workshop held in Lagos, Goethe-Institut Inter Nationes, March 16-20, 2002] - Enwezor, Okwui 1963-2019 (Hatje Cantz, 2002)