by VALENTINE, G. A, PERRY, F. V, WOLDEGABRIEL, G
Published in Journal of volcanology and geothermal research (01.12.2000)

by Hansen, C.W., Birkholzer, J.T., Blink, J., Bryan, C.R., Chen, Y., Gross, M.B., Hardin, E., Houseworth, J., Howard, R., Jarek, R., Lee, K.P., Lester, B., Mariner, P., Mattie, P.D., Mehta, S., Perry, F.V., Robinson, B., Sassani, D., Sevougian, S.D., Stein, J.S., Wasiolek, M.
Published in Reliability engineering & system safety (01.02.2014)

by Ratcliff, Catherine D., Geissman, John W., Perry, Frank V., Crowe, Bruce M., Zeitler, Peter K.
Published in Science (American Association for the Advancement of Science) (21.10.1994)