Provides RIS export: http://www.oapen.org/search?identifier=514270;keyword=history
RIS can be easily scraped as exemplarily implemented here: https://bitbucket.org/bibsonomy/bibsonomy/src/master/bibsonomy-scraper/src/main/java/org/bibsonomy/scraper/url/kde/pubmed/PubMedScraper.java
please also add testcases
I already had the scraper fixed, but oapen recently removed the download button. It only offers a document, where the ris of most articles can be found. https://www.oapen.org/article/metadata.