Sven Groppe Lina Hartung Automatically Generating Citation Graphs (and Variants) for Systematic Reviews 1-25 2021 Open Journal of Information Systems (OJIS) 8 1 https://www.ronpub.com/ojis/OJIS_2021v8i1n01_Groppe.html http://nbn-resolving.de/urn:nbn:de:101:1-2021050919330457300473 urn:nbn:de:101:1-2021050919330457300473 RonPub UG (haftungsbeschränkt)