Back to matchesWe found a matchYour institution may have access to this item. Find your institution then sign in to continue.TitleSteady state and portfolio concept in R & D management.AuthorsBalthasar, H. U.; Gutzwiller, St.PublicationR&D Management, 1975, Vol 5, Issue 3, p201ISSN0033-6807Publication typeArticleDOI10.1111/j.1467-9310.1975.tb01238.x