3048
3048
// DOI-regexp provided by http://stackoverflow.com/a/10324802/873282
3050
3052
private static final String REGEXP_DOI_WITH_HTTP_PREFIX = "http[s]?://[^\\s]*?" + REGEXP_PLAINDOI;
3051
3053
private static final Pattern PATTERN_PLAINDOI = Pattern.compile(REGEXP_PLAINDOI);