@inproceedings{matthew1999mutually,
title={Mutually stationary sequences of sets and the non-saturation of the non-stationary ideal on$P$_{ϰ}(λ)},
author={Matthew Foreman, and Menachem Magidor},
url={http://archive.ymsc.tsinghua.edu.cn/pacm_paperurl/20170108203338424505610},
booktitle={Acta Mathematica},
volume={186},
number={2},
pages={271-300},
year={1999},
}
Matthew Foreman, and Menachem Magidor. Mutually stationary sequences of sets and the non-saturation of the non-stationary ideal on$P$_{ϰ}(λ). 1999. Vol. 186. In Acta Mathematica. pp.271-300. http://archive.ymsc.tsinghua.edu.cn/pacm_paperurl/20170108203338424505610.