Wulandari D, Witjaksono M, Soseco T, Narmaditya BS. The Development of Productive Economy Cluster through Siparti 3-S and Triple Helix in Kabupaten Lumajang, Indonesia. IJEFI [Internet]. 2017 Apr. 3 [cited 2024 Nov. 24];7(2):25-31. Available from: https://econjournals.com/index.php/ijefi/article/view/3796