Robertson, I., Loader, N., Robertson, I., Barker, A., Switsur, V., & Waterhouse, J. (1997). An improved technique for the batch processing of small wholewood samples to α-cellulose. Chemical Geology, 136(3-4), pp. 313-317. doi:10.1016/S0009-2541(96)00133-7

Robertson, Iain, N.J Loader, I. Robertson, A.C Barker, V.R Switsur, and J.S Waterhouse. "An Improved Technique for the Batch Processing of Small Wholewood Samples to α-cellulose." Chemical Geology 136, no. 3-4 (1997): 313-317.

Robertson, Iain, et al. "An Improved Technique for the Batch Processing of Small Wholewood Samples to α-cellulose." Chemical Geology 136.3-4 (1997): 313-317.