if (requireNamespace("bibtex", quietly=TRUE)) {
(z <- system.file('extdata/crossref.bib', package = "handlr"))
bibtex_reader(x = z)
(z <- system.file('extdata/bibtex.bib', package = "handlr"))
bibtex_reader(x = z)
# many at once
(z <- system.file('extdata/bib-many.bib', package = "handlr"))
bibtex_reader(x = z)
}
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