Search for books and e-books in the Search box on the library´s start page, refine on the left to E-books & Printed books.
Search for printed books in the Swedish national catalogue LIBRIS.
you can always request it as an interlibrary loan, or suggest its purchase.
Find journal titles via the Main Search Box. Choose filter (left in the Search Box), E-journals, and write the title, or part of it.
You find all e-journals through the E-Journals. Search for title, or part of the title, or on ISSN. You can also browse titles by discipline.
Search for journals on Ulrichweb and find out if they are peer-reviewed. The symbol 
indicates refereed publications.