Suchmaschine PDF ist eine Suchmaschine für frei verfügbare pdfs: “The site has two objectives: to allow scientists and students to find free research articles and to create an online scientific community.”
What you can find in
As the best free research papers website, you can find free PDFs of scientific publications (search tool) and useful tips to improve your hard work in finding the scientific articles you need.
As a scientific community website, you can find a social network for scientists and researchers (join us).
A gateway to global visibility for your scientific research.”