Naoi, Makoto and Ogasawara, Hiroshi and Takeuchi, Junichi and Yamamoto, Akihito and Shimoda, Naoyuki and Morishita, Ken and Ishii, Hiroshi and Nakao, Shigeru and van Aswegen, Gerrie and Mendecki, Aleksander J. and Lenegan, Patrick and Ebrahim-Trollope, Rookshana and Iio, Yoshihisa  (2006) Small slow-strain steps and their forerunners observed in gold mine in South Africa.  Geophysical Research Letters, 33 (12).  DOI: https://doi.org/10.1029/2006GL026507 <https://doi.org/10.1029/2006GL026507>