In Ireland's Horse Review was published an article about the WEF Sport Horse Auction 2013:
Ireland's Horse Review

At Horsesinternational.com was an article about the VDL Stud:
VDL Stud: one of the most prominent exporter of horses

And also recently there was an article with Jur Vrieling about the combination of competing stallions and breeding:
Jur Vrieling: ‘Stallions get warmed up before jumping the phantom’