Greetings from Michigan, I will try to use plain language that is easier to translate through google.
There are four books that I will recommend, they can all be effective guides for 800m training.
"Modern Training and Physiology for Middle and Long-Distance Runners" by John Davis (ISBN: 978-0615790299)
"The Self-Coached Runner II: Cross Country and the Shorter Distances" by Allan Lawrence and Mark Scheid (ISBN: 978-0316773027)
"How They Train: Middle Distances" by Fred Wilt (ISBN: 978-0911520385)
"Middle Distances: Contemporary Theory, Technique & Training (Contemporary Track and Field Series)" by Jess Jarver (ISBN: 978-0911521498)
Scientific Articles / Research Papers are not something I am very familiar with, but I hope the books I mentioned above can help. These books should give you a broad sample of different training methods and ideas. I hope that you find something useful, and hope you post in the future to let us all know how training is going. Best Wishes