Kowalczyk, Bogumiła, et al. “THE BOUNDS OF SOME DETERMINANTS FOR FUNCTIONS OF BOUNDED TURNING OF ORDER ALPHA”. Bulletin de la Société Des Sciences et Des Lettres de Łódź, vol. 67, no. 1, Apr. 2017, pp. 107–118, https://doi.org/10.26485/0459-6854/2017/67.1/8.