1. Alerstam, T. and Lindström, Å., Optimal bird migration: the relative importance of time, energy, and safety, in Bird Migration, Gwinner, E., Berlin: Springer-Verlag, 1990, pp. 331–351.
2. Komi Republic;V.M. Anufriev,2000
3. Arizaga, J., Alonso, D., Campos, F., Unamuno, J.M., Monteagudo, A., Fernandez, G., Carregal, X.M., and Barba, E., Do subspecies of bluethroat Luscinia svecica show a geographic segregation during the autumn migration period in Spain?, Ardeola, 2006, vol. 53, pp. 285–291.
4. Arizaga, J., Barba, E., Alonso, D., and Vilches, A., Stopover of bluethroats (Luscinia svecica cyanecula) in northern Iberia during the autumn migration period, Ardeola, 2010, vol. 57, pp. 69–85.
5. Arizaga, J., Mendiburu, A., Alonso, D., Cuadrado, J.F., Jauregi, J.I., and Sánchez, J.M., A comparison of stopover behavior of two subspecies of the bluethroat (Luscinia svecica) in Northern Iberia during the autumn migration period, Ardeola, 2011, vol. 58, pp. 251–265.