5Malcohn Lansley, Sercel, John Gibson, Forest Lin*, Alexandre Egreteau and Julien Meunier, CGGVerilas, The case for longer sweeps in vibrator acquisition , SEG Houston 2009 International Exposition and Annual Meeting:94-98.
6ZHOUHONG WEI and THOMAS F. PHILLIPS, INOVA Geophysical Equipment PETER I. PECHOLCS, Saudi Aramco, analyses of vibrator performance using long and short sweeps, Special section: land Acquisition, Vibmseis, October 2011 The Leading Edge: 1189.