Allen, Richard B. "Slaves, Convicts, Abolitionism and the Global Origins of the Post-Emancipation Indentured Labor System." Slavery and Abolition 35 no. 2 (2014): 328–348.
Boris, Eileen. 2019. Making the Woman Worker: Precarious Labor and the Fight for Global Standards, 1919-2019. Oxford: Oxford University Press.
Keese, Alexander. 'The Constraints of Late Colonial Reform Policy: Forced Labour Scandals in the Portuguese Congo (Angola) and the Limits of Reform under Authoritarian Colonial Rule, 1955–61'. Portuguese Studies 28, no. 2 (2012): 186–200.
Foner, Eric. 'The Meaning of Freedom in the Age of Emancipation'. Journal of American History 81, no. 2 (1994): 435–60.
LeBaron, Genevieve. 'Unfree Labour Beyond Binaries'. International Feminist Journal of Politics 17, no. 1 (2015): 1–19.
Linden, Marcel van der, and Magaly Rodríguez García. 2016. On Coerced Labor : Work and Compulsion after Chattel Slavery. Leiden: Brill.
Maul, Daniel Roger. (2007). The International Labour Organization and the Struggle against Forced Labour from 1919 to the Present, Labor History, 48 no. 1) 477-500.
Miers, Suzanne. "Slavery: A Question of Definition". Slavery & Abolition 24, no. 2 (2003): 1–16.
O'Connell Davidson, Julia. '"Things" Are Not What They Seem: On Persons, Things, Slaves, and the New Abolitionist Movement'. Current Legal Problems 69, no. 1 (2016): 227–57.