Informační zdroje v zoologii Stano Pekár • electronic version of the publication in the PDF or HTML format • quality of PDF: low - „scanned as a picture“ high - text and pictures • may include colour figures, hypertext, videos, sounds • fulltext is mostly available since late 1990 • only some journals have made all volumes and numbers as fulltext • mainly journals published by large publishers • some journals provide access to older volumes for free • many journals have first-online or early-online access ScienceDirect • Elsevier • 150 journals since 1995 InterScience • John Wiley & Sons, Blackwell • 500 journals since 1996 SpringerLink • Springer and Kluwer • 1300 journals since 1997 Academic Search Primer • Academic Press • 4400 journals since 1965 Journal of Storage • Anthropology and Ecology • 25 journals since their first number ProQuest 5000 • only some American publishers • 3200 journals since 1992 BioOne • Cambridge Scientific • 110 journals since 1998 J-Stage • Japan Science and Technology Agency • several biological journals DOAJ • open-access journals • 150 biological journals Ingenta Connect • Ingenta • 830 biological journals ACS Journal Archive - chemical journals, plus environment • Write the name of the database that includes PDF of each of your 10 references.