Omenya, AHuchzermeyer, M2015-05-202015-05-202006Informal Settlements: A Perpetual Challenge?https://books.google.co.ke/books?hl=en&lr=&id=8IOIeykh8rgC&oi=fnd&pg=PA290&dq=Alfred+Omenya&ots=absOTIpQJr&sig=pSGIomuAZWVozOf6JgcZINy6kYE&redir_esc=y#v=onepage&q=Alfred%20Omenya&f=falsehttp://hdl.handle.net/123456789/998enSlum upgrading in the complex context of policy change: the case of NairobiBook chapter