Author,Title,Journal,ISSN,Publisher,Date,Volume,Number,Page,URL,URL(DOI) Ronald Klingebiel and Christian Rammer,Resource allocation strategy for innovation portfolio management,Strategic Management Journal,0143-2095,Wiley,2013-05-22,35,2,246-268,https://cir.nii.ac.jp/crid/1361137045904876288,https://doi.org/10.1002/smj.2107