Check out this in-class training from Oliver Sturm and Professional Developer Training in the Netherlands:
If you’re in Europe, then I recommend this course from Oliver Sturm who is a fantastic teacher. I’ve seen Oliver present first hand and I fully recommend his courseware!
If you have any questions about the courses then please visit the course home page:
http://www.oliversturm.com/bizapps-dxaspnet.html
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