Akbar, I. Z., Kania, N., Setiawan, B., Nurdiana, N., & Widodo, M. A. (2011). Decreased osteoblasts and increased osteoclasts in rats after coal dust exposure. Universa Medicina, 30(2), 73–79. https://doi.org/10.18051/UnivMed.2011.v30.73-79