Kumar, R., Sachan, P., Singh, S. K., Gupta, A. K., & Mohan, L. (2019). A prospective observational study on efficacy of black acetic acid combination peel in patients of facial nodulocystic acne. International Journal of Research in Dermatology, 5(4), 673–677. https://doi.org/10.18203/issn.2455-4529.IntJResDermatol20194544