APA (7th ed.) Citation

Tkach, N. V., Golovatskij, V. A., & Frankiv, I. B. (2011). Impurity states of electrons in spherical nanosystems.

Chicago Style (17th ed.) Citation

Tkach, N. V., V. A. Golovatskij, and I. B. Frankiv. Impurity States of Electrons in Spherical Nanosystems. 2011.

MLA (8th ed.) Citation

Tkach, N. V., et al. Impurity States of Electrons in Spherical Nanosystems. 2011.

Warning: These citations may not always be 100% accurate.