1. Kiesselbach, Max R., and Eagle, Harry: Negative serological tests in secondary-syphilis, Venereal Disease Seminar Digest, vol. 1, VII, p. 9
2. Arsenic resistant secondary syphilis accompanied by negative serology;Vilanova;Actas dermo-sif.,1945
3. Arsenobismuth-resistant syphilis with persistently negative serology and cutaneomucosal lesions with abundant Treponema cured with mapharsen (arsenic preparation): case;Prieto;Actas dermo-sif.,1943
4. Developments of secondary manifestations during erythroderma caused by neoarsphenamine and accompanied by negative seroreactions; case;Fournier;Ann. d. mal. ven.,1935
5. The problem of treatment-resistant syphilis;Beerman;Am. J. Syph. Gonor. & Ven. Dis.,1936