Nesvizhevsky, V. V., Petukhov, A. K., Börner, H. G., Baranova, T. A., Gagarski, A. M., Petrov, G. A., Protasov, K. V., Yu Voronin, A., Baeßler, S., Abele, H., Westphal, A., & Lucovac, L. (2005). Study of the neutron quantum states in the gravity field. The European Physical Journal C, 40(4), 479–491. https://doi.org/10.1140/epjc/s2005-02135-y