When conducting research on East Timor see the recommended books listed here, especially pages 193-201 of the Historical Dictionary of East Timor. This will provide a good introduction to doing research on the country. For a book on the latest developments and a guide to the key issues and debates on East Timor today see the Routledge Handbook of Contemporary Timor-Leste. 2019. For articles see the database Bibliography of Asian Studies.
Historical Dictionary of East Timor
Timor: including the islands of Roti and Ndao