| Computational and experimental works on ship resistance WR Hetharia, ER De Fretes, F Gaspersz IOP Conference Series: Earth and Environmental Science 339 (1), 012036, 2019 | 5 | 2019 |
| Analisa Numerik Pemilihan Geometri Fin Buritan untuk Kapal-Kapal Speed Boat yang Beroperasi di Ambon dan Sekitarnya ER de Fretes ALE Proceeding 1, 80-85, 2018 | 3 | 2018 |
| Analisis Tekanan Angin Airbag Saat Peluncuran Kapal ER de Fretes, HS Lainsamputty, R Iriawan ALE Proceeding 5, 25-29, 2022 | 2 | 2022 |
| Hydrodynamic analysis of additional effect of submarine appendages ER De Fretes, EB Djatmiko, W Wardhana Advances and Applications in Fluid Mechanics 13 (1), 65-74, 2013 | 2 | 2013 |
| Analisis Pengembangan Galangan Dengan Menggunakan Sistem Airbag Di Maluku ER de Fretes ALE Proceeding 5, 116-120, 2022 | 1 | 2022 |
| The resistance aspect of fishing boat skipjack pole and line WR Hetharia, ER de Fretes, RH Siahainenia ALE Proceeding 4, 1-7, 2021 | 1 | 2021 |
| Pengaruh Kemiringan Poros Baling-Baling Terhadap Kecepatan Perahu Ketinting MN Habib, ER de Fretes, STA Lekatompessy ALE Proceeding 4, 18-22, 2021 | 1 | 2021 |
| Design and future application of mobile fish platform for local fishermen in the archipelago regions WR Hetharia, F Gaspersz, ER de Fretes IOP Conference Series: Earth and Environmental Science 649 (1), 012006, 2021 | 1 | 2021 |
| ANALISIS PENGARUH SUDUT KEMIRINGAN POROS BALING-BALING TERHADAP KECEPATAN PERAHU KETINTING YANG MENGGUNAKAN MESIN DI LUAR DENGAN MESIN DI DALAM LAMBUNG PERAHU EP Lamerkabel, ER de Fretes, RB Luhulima ALE Proceeding 6, 121-124, 2023 | | 2023 |
| PENGARUH MODIFIKASI KEMUDI PLAT MENJADI KEMUDI NACA 0010 PADA KM. HARAPAN MUJUR 04 ER de Fretes, GR Latuhihin ALE Proceeding 6, 115-120, 2023 | | 2023 |
| ANALISIS PENGGUNAAN FLAP BURITAN SPEED BOAT UNTUK MENDAPATKAN TRIM YANG EVEN KEEL ER de Fretes ALE Proceeding 6, 110-114, 2023 | | 2023 |
| ANALISIS PERHITUNGAN BALLAST MATI PADA KAPAL KN. KALAWAI SH Hutagalung, ER de Fretes, F Gaspersz ALE Proceeding 6, 125-132, 2023 | | 2023 |
| ANALISIS PENAMBAHAN KAPASITAS SLIPWAY PADA PT. DOK DAN PERKAPALAN WAIAME (PERSERO) AMBON PF Balubun, ER de Fretes, RP Soumokil Journal Teknik Mesin, Elektro, Informatika, Kelautan dan Sains 3 (1), 47-57, 2023 | | 2023 |
| Preliminary design of small semi-displacement passenger ships for the archipelago regions WR Hetharia, ER de Fretes, EJ Legwurnitua, M Uruilal IOP Conference Series: Earth and Environmental Science 972 (1), 012062, 2022 | | 2022 |
| The Application of Solid Boxes Combination and Air Bags to Support The Unsinkable Small Passenger Boat JL Wolter R Hetharia, Eliza R de Fretes, Fella Gaspersz Marine-Earth Science Marine-Earth Technology 1 (Vol 1 No 1 (2021)), 2021 | | 2021 |
| Problems and technical solutions of capture fisheries in Eastern Indonesian waters WR Hetharia, ER de Fretes, F Gaspersz, J Tupan, A Feninlambir IOP Conference Series: Materials Science and Engineering 1052 (1), 012041, 2021 | | 2021 |
| ANALISA PARAMETRIK PENEMPATAN FIN BURITAN PADA SPEED BOAT DI MALUKU ER de Fretes ALE Proceeding 3, 1-6, 2020 | | 2020 |
| The Application of Combination of Solid Boxes and Air Bags to Support the Unsinkable Small Passenger Boat WR Hetharia, ER de Fretes, F Gaspersz, J Louhenapessy Journal of Marine-Earth Science and Technology 1 (1), 8-13, 2020 | | 2020 |
| ANALISA PARAMETRIK CHANNEL FLOW PADA LAMBUNG KAPAL CEPAT UNTUK MEMPEROLEH WAKE MAKSIMUM STUDI KASUS: KAPAL CEPAT RUTE AMBON WAYAME ER de Fretes ALE Proceeding 2, 1-5, 2019 | | 2019 |
| solar2Wave: design floating solar farms to overcome tough ocean waves | | |
