An anatomy of requirements engineering in software startups using multi-vocal literature and case survey. - Nirnaya Tripathi; Eriks Klotins; Rafael Prikladnicki; Markku Oivo; Leandro Bento Pompermaier; Arun Sojan Kudakacheril; Michael Unterkalmsteiner; Kari Liukkunen; Tony Gorschek (J. Syst. Softw., 2018)