Sharma, R. K., B. K. Bhattarai, B. Sapkota, M. B. Gewali, and B. Kjeldstad. “Temporal Variation of Black Carbon Aerosol Concentration During Monsoon in Kathmandu Valley”. Journal of the Institute of Engineering, vol. 9, no. 1, June 2014, pp. 37-35, doi:10.3126/jie.v9i1.10666.