Adams, R. J., W. F. Perger, W. I. Rose and A. Kostinski, 1996, Measurements of the complex dielectric constant of volcanic ash from 4 to 19 GHz, J. Geophys. Res., 101:8175-8185.

Riley, C M, W I Rose and G J S Bluth, 2003, Quantitative shape measurements of distal volcanic ash, Jour Geophys Res 108 no B10, 2504

K Genareau, GK Mulukutla, AA Proussevitch DL Sahagian, AJ Durant and WI Rose,  2012, “Sizing up the bubbles that Produce very fine ash during volcanic eruptions”,  Geophys Res Letters 39 DOI:10.1029/2012GL052471.

Alexander S Lloyd, T Plank, P Ruprecht, EH Hauri and WI Rose:  2012, “Volatile loss from melt inclusions in pyroclasts of different sizes”, Contrib to Mineralogy and Petrology, DOI: 10.1007/s00410-012-0800-2.