z <- system.file('extdata/crossref.ris', package = "handlr")
res <- ris_reader(z)
handl_to_df(res)
(x <- HandlrClient$new(x = z))
x$as_df() # empty data.frame
x$read()
x$as_df() # data.frame with citation data
if (requireNamespace("bibtex", quietly=TRUE)) {
(z <- system.file('extdata/bib-many.bib', package = "handlr"))
res2 <- bibtex_reader(x = z)
handl_to_df(res2)
}
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