Get references for a given publicationSource:
This function retrieves all the works listed in the bibliography of a given article.
character, publication identifier
character, data source, by default Pubmed/MedLine index will be searched.
The following three letter codes represent the sources Europe PubMed Central supports:
Agricola is a bibliographic database of citations to the agricultural literature created by the US National Agricultural Library and its co-operators.
Chinese Biological Abstracts
EthOs Theses, i.e. PhD theses (British Library)
Europe PMC Book metadata
integer, number of results. By default, this function returns 100 records.
logical, print some information on what is going on.