Cite

    V. V. Ivanitskii et al.. “Sequential organization in the song of thrush nightingale (Luscinia luscinia): clustering and sequential order of the song types.” Bioacoustics, vol. 26, no. 2, n.d., pp. 199–215. http://access.bl.uk/ark:/81055/vdc_100044586547.0x00004d