Walter Freudenthal (English Wikipedia)

Eller, Joseph Jordan (1 December 1930). "Senile Keratoses and Seborrhheic Keratoses". Archives of Dermatology and Syphilology. 22 (6): 1043. doi:10.1001/archderm.1930.01440180089008. ISSN 0096-6029.
Pinkus, Hermann (1 March 1958). "Keratosis Senilis: A Biologic Concept of its Pathogenesis and Diagnosis Based on the Study of Normal Epidermis and 1730 Seborrheic and Senile Keratoses". American Journal of Clinical Pathology. 29 (3): 193–207. doi:10.1093/ajcp/29.3.193. ISSN 0002-9173. PMID 13520651.
"Section of Dermatology". Proceedings of the Royal Society of Medicine. 45 (4): 173–176. 1952. doi:10.1177/003591575204500402. ISSN 0035-9157. PMC 1987456.
Karaa, Amel; Khachemoune, Amor (July 2007). "Keratoacanthoma: a tumor in search of a classification". International Journal of Dermatology. 46 (7): 671–678. doi:10.1111/j.1365-4632.2007.03260.x. ISSN 0011-9059. PMID 17614793. S2CID 37221570.

mhmedical.com

Usatine, Richard P.; Smith, Mindy A.; Chumley, Heidi S.; Mayeaux, E.J. (2013), "Chapter 167. Keratoacanthoma", The Color Atlas of Family Medicine (2nd ed.), The McGraw-Hill Companies, ISBN 978-0-07-176964-8, retrieved 21 August 2018
Cerroni, Lorenzo; Kerl, Helmut (2012), Goldsmith, Lowell A.; Katz, Stephen I.; Gilchrest, Barbara A.; Paller, Amy S. (eds.), "Chapter 117. Keratoacanthoma", Fitzpatrick's Dermatology in General Medicine (8th ed.), The McGraw-Hill Companies, retrieved 24 August 2018

Pinkus, Hermann (1 March 1958). "Keratosis Senilis: A Biologic Concept of its Pathogenesis and Diagnosis Based on the Study of Normal Epidermis and 1730 Seborrheic and Senile Keratoses". American Journal of Clinical Pathology. 29 (3): 193–207. doi:10.1093/ajcp/29.3.193. ISSN 0002-9173. PMID 13520651.
Karaa, Amel; Khachemoune, Amor (July 2007). "Keratoacanthoma: a tumor in search of a classification". International Journal of Dermatology. 46 (7): 671–678. doi:10.1111/j.1365-4632.2007.03260.x. ISSN 0011-9059. PMID 17614793. S2CID 37221570.

"Section of Dermatology". Proceedings of the Royal Society of Medicine. 45 (4): 173–176. 1952. doi:10.1177/003591575204500402. ISSN 0035-9157. PMC 1987456.

"Geoffrey Barrow Dowling". Lives of the fellows. Royal College of Physicians. Retrieved 19 September 2018.

Karaa, Amel; Khachemoune, Amor (July 2007). "Keratoacanthoma: a tumor in search of a classification". International Journal of Dermatology. 46 (7): 671–678. doi:10.1111/j.1365-4632.2007.03260.x. ISSN 0011-9059. PMID 17614793. S2CID 37221570.

"Hoffmann, Ruth nell'Enciclopedia Treccani". treccani.it (in Italian). Retrieved 21 August 2018.

Eller, Joseph Jordan (1 December 1930). "Senile Keratoses and Seborrhheic Keratoses". Archives of Dermatology and Syphilology. 22 (6): 1043. doi:10.1001/archderm.1930.01440180089008. ISSN 0096-6029.
Pinkus, Hermann (1 March 1958). "Keratosis Senilis: A Biologic Concept of its Pathogenesis and Diagnosis Based on the Study of Normal Epidermis and 1730 Seborrheic and Senile Keratoses". American Journal of Clinical Pathology. 29 (3): 193–207. doi:10.1093/ajcp/29.3.193. ISSN 0002-9173. PMID 13520651.
"Section of Dermatology". Proceedings of the Royal Society of Medicine. 45 (4): 173–176. 1952. doi:10.1177/003591575204500402. ISSN 0035-9157. PMC 1987456.
Karaa, Amel; Khachemoune, Amor (July 2007). "Keratoacanthoma: a tumor in search of a classification". International Journal of Dermatology. 46 (7): 671–678. doi:10.1111/j.1365-4632.2007.03260.x. ISSN 0011-9059. PMID 17614793. S2CID 37221570.