http://globalarbitrationreview.com/news/article/33888/qatari-investor-sues-jordan-under-arab-treaty/ (requires subscription)
http://www.iareporter.com/articles/qatari-businessman-contends-that-mfn-clause-in-regional-treaty-can-provide-foothold-for-an-icsid-claim-against-jordan/ (requires subscription)
http://globalarbitrationreview.com/benchmarking/gar-100-10th-edition/1136170/homburger (requires subscription)