Brownlie, Ian (1998) Principles of Public International Law, Fifth Edition, Oxford University Press.
Erdilmen, Merve and Iseult Honohan (2020) "Trends in Birthright Citizenship in EU 28 2013-2020", Global Citizenship Observatory (GLOBALCIT),Robert Schuman Centre for Advanced Studies in collaboration with Edinburgh University Law School Printed in Italy, (2020/11/15), Available at : www.eui.eu/RSCAS/Publications/
Groot, Gerard‑René and Olivier Vonk (2018) "Acquisition of Nationality by Birth on a Particular Territory or Establishment of Parentage: Global Trends Regarding Ius Sanguinis and Ius Soli", Netherlands International Law Review, Vol.65, No.3, pp.319–335.
Hailbronner, Kay (2007) "Nationality in Public International Law and European Law", Acquisition and Loss of Nationality: Comparative Analyses Volume. 1: Comparative Analyses: Policies and Trends in 15 European Countries, Netherland, Amsterdam University Press.
Honohan, Iseult (2010) Ius Soli Citizenship, Eudo Citizenship Policy Brief, Vol.10, No. 1.
Kostakopoulou, Dora (2008)," The Evolution of European Union Citizenship", European Political Science, vol: 7, No.2, pages, 285–295.
Ngai M.May (2007) "Birthright Citizenship and the Alien Citizen", Fordham Law Review, Vol.75, No.5, pp.2521-2530.
Schuck H. Peter (2002) "Plural Citizenship", in, Dual Nationality, Social Rights and Federal Citizenship in the U.S and Europe, Berghahn Books, First Published.
Shachar, Ayelet (2003) Children of a Lesser state: Sustaining Global Inequality Through Citizenship Laws, USA, New York University School of Law New York, NY 10012 .
Slater, Avery (2014) "Jus Sanguinis, Jus Soli West German Citizenship Law and the Melodrama of the Guest Worker in Fassbinder’s Angst Essen Seele Auf ", Cultural Critique, Vol. 86, winter, pp. 92-118.
The Harvard Draft Code on Nationality (1929) American Journal of International Law, (Special Number 23).
Waldrauch, Harald (2007) "Right of expatriates, Multiple Citizens and Restricted Citizenship for Certain Nationals": Acquisition and Loss of Nationality: Comparative Analyses Volume. 1: Comparative Analyses: Policies and Trends in 15 European Countries, Netherland, Amsterdam University Press.
Weil Patrick and Alexis Spire (2007) "France": Acquisition and Loss of Nationality: Comparative Analyses Volume. 1: Comparative Analyses: Policies and Trends in 15 European Countries, Netherland, Amsterdam University Press.
Documents
Global Legal Research Center (2012) "Citizenship Based on Birth in Country", published by The Law Library of Congress, (2020/10/23), avaliable at: https://www.loc.gov/law/help/citizenship-birth-country/citizenship-birth-country.pdf
Draft African Nationality Protocol.