Digital library NLK
Source
NLK
ROAD: Directory of Open Access Scholarly Resources
from 2005
The link will be redirected to the address of the production version after the testing phase.
AND or + signifies AND operation (intersection)
OR or | signifies OR operation (union)
- negates a single word
" wraps text to signify a phrase
* at the end of a term signifies a right-side expansion
( and ) signify precedence
~N after a word signifies edit distance (fuzziness)
~N after a phrase signifies words distance