1. Distribution of isomers of BHC and related histopathology of liver in HCCH fed mice;Nigam;Arch Env Health,1982
2. Effect of immunosuppressive agents on tumourogeneces in Swiss mice;Nigam;Asian Med J,1982
3. Ashok K, Nigam SK, Venkatakrishna Bhatt H. Effect of oral protein and benzene hexachloride (HCCH) on liver and tumour incidence in Swiss mice. Symposium: Chemical Carcinogens and Enviroment, Hyderabad, India: 11–14 Dec. 1985. Proc UGC Natl Symp Chem Carcinogenesis Environ 1985;27.
4. Nigam SK, Venkatakrishna-Bhatt H. Adoptive transfer of immunity in spleen cells under experimental conditions. Proc Natl Acad Sci (India) 1994. 64th Seminar, Chandigarh, Punjab, India. p. 17.
5. Adoptive transfer of immunity in spleen cells collected from experimentally produced sarcomas in mice;Nigam;Discovery & Innovation,1994