Gawlińska-Nęcek, K., et al. “A Solution-Processable Small-Organic Molecules Containing Carbazole or Phenoxazine Structure As Hole-Transport Materials for Perovskite Solar Cells”. Opto-Electronics Review, vol. 27, no. 2, Apr. 2026, pp. 137-42, https://wydawnictwo.pan.pl/index.php/opelre/article/view/648.