The source code of different parts of the paper, survey, and interview scripts and reports are attached as ReplicationPackage.zip.
Open-source Documentation Corpus has been attached as OSSDocumentationCorpus.zip. However, you should download the zip file parts, i.e., OSSDocumentationCorpus.z01, OSSDocumentationCorpus.z02, and OSSDocumentationCorpus.z03 to extract the zip file. Refer to the below link for more information on unzipping the corpus zip.