El Daif, C.; Shuayb, M.; Maalouf, M.: The vulnerability of refugees amid Lebanese law and the humanitarian policies. (2021), 88 S.

Kaga, M.; Nakache, D.; Anderson, M.; Crépau, F.; Delisle, A.; Fraser, N.; Frenyó, E.; Purkey, A.; Soennecken, D.; Ritika, T.: Vulnerability in the Canadian protection regime: research report on the policy framework. (2021), 101 S.

Kluth, W.; Heuser, H.; Junghans, J.: Addressing Vulnerabilities of protection seekers in German federalism: research report 2020 on the identification and assistance of vulnerable persons in asylum and reception procedures and humanitarian admission. (2021), 44 S.

Lidén, H.; Schultz, J.; Paasche, E.; Wessmann, H.: Vulnerable protection seekers in Norway: regulations, practices, and challenges. (2021), 173 S.

Marchetti, S.; Palumbo, L.: Vulnerability in the asylum and protection system in Italy: legal and policy framework and implementing practices. (2021), 132 S.

Risks of childhood statelessness for the children associated with alleged ‘foreign fighters’ detained in Syria and Iraq (Policy report, 67: Oct 2021). PolicyBristol (2021)

Deprivation of nationality and the prevention of statelessness in Europe. European Network on Statelessness (2021)

Saroléa, S.; Raimondo, F.; Crine, Z.: Exploring vulnerability's challenges and pitfalls in Belgian asylum system: research report on the legal and policy framework and implementing practices in Belgium. (2021), 266 S.

Thönnes, C.: COVID-19 Contact Tracing Apps in the EU: Lessons from Germany. (2021)

Minimum Cuts in Directed Graphs via √n Max-Flows.

Yang, G.-Z.; Collins, S. H.; Dario, P.; Fischer, P.; Goldberg, K.; Laschi, C.; McNutt, M. K. (Hg.): Five years of Science Robotics (Sonderheft). Science Robotics 6, (61) (2021)

Levshina, N.; Moran, S. (Hg.): Efficiency in human languages: Corpus evidence for universal principles (Sonderheft). Linguistics Vanguard 7, (s3) (2021)

Fischer, P.; Nelson, B. J. (Hg.): Tiny robots make big advances (Sonderheft). Science Robotics 6, (52) (2021)

König, C.; Krewald, V.; Roemelt, M.; Rossi, M. (Hg.): Special Issue: Germany’s Future in Theoretical and Computational Chemistry: a Special Issue Celebrating DEAL (Sonderheft). International Journal of Quantum Chemistry 121, (3) (2021)

Benner, P.; Klawonn, A.; Stoll, M. (Hg.): Special Issue:Scientific Machine Learning ‐ Part I (Sonderheft). GAMM-Mitteilungen 44, (1) (2021)

Eviatar, Z.; Huettig, F. (Hg.): Literacy and writing systems (Sonderheft). Journal of Cultural Cognitive Science (2021)

Greenfield, M. D.; Honing, H.; Kotz, S. A.; Ravignani, A. (Hg.): Synchrony and rhythm interaction: From the brain to behavioural ecology (Sonderheft). Philosophical Transactions of the Royal Society of London, Series B: Biological Sciences 376 (2021)

Barua, R.; Oberländer, A.; Hämmerle, C.; Kraft, C. (Hg.): Fluid feelings [Special issue] (Sonderheft). L'Homme: Europäische Zeitschrift für Feministische Geschichtswissenschaft 32, (2) (2021)

Cutler, A.; Aslin, R. N.; Gervain, J.; Nespor, M. (Hg.): Special issue in honor of Jacques Mehler, Cognition's founding editor (Sonderheft). Cognition 213 (2021)

Evans, N.; Levinson, S. C.; Sterelny, K. (Hg.): Thematic issue on evolution of kinship systems (Sonderheft). Biological theory 16 (2021)