I've had a quick look at the page and it certainly has a lot of info.There are many viking sagas to choose from if you are looking for primary sources, but I'm not sure which are specifically Swedish. Try the bibliography here: History of Sweden - Wikipedia, the free encyclopedia
Good luck in your search.
Sometimes it's hard to find really specific data on subjects on the internet. People who have researched them (say for example a PhD graduate) write books or essays on that topic but the rights are signed to them and so it isn't released on the internet. You might want to have a go at actually buying a historical book on Vikings. This was the first one I found which is just an example of how a book can have what you want when the internet doesn't.
The World's Greatest Civilizations: The History and Culture of the Vikings: Charles River Editors: Amazon.com: Kindle Store
There's also libraries, if one doesn't have the means to buy multiple volumes on a subject matter.
There's a great book called Exploring the World of the Vikings, published by Richard Hall, that has 100% glossy pages showing you their artifacts and archaeological diagrams, as well as lots of details and analysis of their lifestyle. I've only been able to find it at the library. Definitely the best of the many that I looked at.