Lelong, O., Arabaolaza, I., Ballin, T., Evans, J., Evershed, R., Kirk, S., Lamb, A., McLaren, D., Šoberl, L. and Wilkin, N. (2019) “Knappach Toll, Balbridie”, Scottish Archaeological Internet Reports, 83, pp. 1-36. doi: 10.9750/issn.2056-7421.2019.83.1-36.