Purvis, A., McWilliam, R., Johnson, S., Seed, N., Williams, G., Maiden, A., & Ivey, P. (2007). Photolithographic Patterning of Bi-Helical Tracks onto Conical Substrates. Journal of Micro/Nanopatterning, Materials, and Metrology, 6(4), https://doi.org/10.1117/1.2824377