Brecx, M., Theilade, J., & Attstrom, R. (1983). An Ultrastructural Quantitative Study of the Significance of Microbial Multiplication During Early Dental Plaque Growth. Journal of Periodontal Research, 18(2), 177-186. https://doi.org/10.1111/j.1600-0765.1983.tb00351.x (Original work published 1983)