Bieszk‑Stolorz, Beata. “Stratified Cox Model With Interactions in Analysis of Recurrent Events”. Acta Universitatis Lodziensis. Folia Oeconomica 3, no. 335 (May 16, 2018): 207–218. Accessed May 1, 2024. https://www.czasopisma.uni.lodz.pl/foe/article/view/2448.