Richter, M., Ruspini, P., Mihailov, D., Mintchev, V., & Nollert, M. (2020). Migration and Transnationalism Between Switzerland and Bulgaria. 1st ed. 2017. Springer International Publishing.

Richter, Marina, Paolo Ruspini, Dotcho Mihailov, Vesselin Mintchev, و Michael Nollert. Migration and Transnationalism Between Switzerland and Bulgaria. 1st Ed. 2017. Springer International Publishing, 2020.

Richter, Marina, et al. Migration and Transnationalism Between Switzerland and Bulgaria. 1st Ed. 2017. Springer International Publishing, 2020.