1. Primary esophageal melanoma: features of diagnosis and treatment
   B. V. Sigua et al, 2022, Grekov's Bulletin of Surgery CrossRef
2. The Thousand Faces of Malignant Melanoma: A Systematic Review of the Primary Malignant Melanoma of the Esophagus
   Gerardo Cazzato et al, 2022, Cancers CrossRef
3. Primary malignant melanoma of the esophagus. Literature review and clinical case
   N. M. Kiselev et al, 2020, Malignant tumours CrossRef
4. Advanced primary amelanotic malignant melanoma of the esophagus: A case report
   Ruo-Xi Zhang et al, 2019, World Journal of Clinical Cases CrossRef
5. A preclinical model of cutaneous melanoma based on reconstructed human epidermis
   Anna Leikeim et al, 2022, Scientific Reports CrossRef