S. P. A. Harahap, N. N. Soeroso, S. P. Tarigan, N. Nainggolan, and E. Mutiara, “The Difference in Carboxyhemoglobin Levels in Blood between Grilled and Non-grilled Food Vendors in Medan, Indonesia”, Open Access Maced J Med Sci, vol. 10, no. T7, pp. 180–184, Mar. 2022.