| Ecology of Nusa Tenggara K Monk, Y De Fretes Tuttle Publishing, 2012 | 454 | 2012 |
| Ekologi Nusa Tenggara dan Maluku KA Monk, Y De Fretes, G Reksodiharjo-Lilley Prenhallindo, Jakarta, 2000 | 93 | 2000 |
| Climate change threatens New Guinea’s biocultural heritage R Cámara-Leret, N Raes, P Roehrdanz, Y De Fretes, CD Heatubun, ... Science Advances 5 (11), eaaz1455, 2019 | 58 | 2019 |
| The Irian Jaya biodiversity conservation priority-setting workshop J Supriatna, Y De Fretes, A Mack, CP Yeager, S Olivieri, JB Burnett, ... Final Report. Washington, DC: Conservation International, 1999 | 37 | 1999 |
| A New Species of Smoky Honeyeater (Meliphagidae: Melipotes) From Western New Guinea BM Beehler, DM Prawiradilaga, Y de Fretes, N Kemp The Auk 124 (3), 1000-1009, 2007 | 35 | 2007 |
| The Manokwari Declaration: Challenges ahead in conserving 70% of Tanah Papua’s forests R Cámara-Leret, A Schuiteman, T Utteridge, G Bramley, R Deverell, ... | 29 | 2019 |
| Conserving biodiversity in the real world: professional practice using a policy orientation T Clark, P Schuyler, T Donnay, P Curlee, T Sullivan, M Cymerys, ... Endangered Species Update 19 (4), 156-161, 2002 | 22 | 2002 |
| Arfak Mountains Nature Conservation Area, Irian Jaya I Craven, Y De Fretes Management Plan 1992, 1988 | 8 | 1988 |
| The Ecology of Nusa Tenggara and Maluku (Vol. The Ecology of Indonesia Series) KA Monk, Y De Fretes, G Reksodihardjo-Lilley Hong Kong: Periplus, 1997 | 7 | 1997 |
| Reksodiharjo-Lilley (1997) The ecology of Nusa Tenggara and Maluku KA Monk, Y De Frétés Indonesian Ministry of Environment and Dalhausie University. Halifax, Nova …, 0 | 6 | |
| The protected area system in Papua Y De Fretes The Ecology of Papua, Part Two, 1251-1275, 2007 | 5 | 2007 |
| Mengenal keanekaragaman hayati Irian Jaya Y de Fretes, B Yaap, A Mack, G Allen Conservation International Indonesia, Jakarta, 1999 | 5 | 1999 |
| dan Lelley, GR 2000 KA Monk, Y De Fretes Ekologi Nusa Tenggara dan Maluku, 0 | 5 | |
| Arfak Mountains Nature Conservation Area I Craven, Y de Fretes Irian Jaya: Management Plan 1992, 1988 | 4 | 1988 |
| The Arfak Mountains Nature Conservation Area, Irian Jaya: Management Plan, 1988-1992 I Craven, Y de Fretes Directorate General of Forest Protection and Nature Conservation (PHPA …, 1987 | 4 | 1987 |
| Milne Bay Province Terrestrial Biodiversity Conservation Outcomes. A Pilot for the New Guinea Wilderness KJ Williams, DK Mitchell, R James, SE Cameron, DP Faith, R Storey, ... Atherton, CSIRO and Conservation International-Melanesia CBC, 2006 | 3 | 2006 |
| The Irian Jaya Biodiversity Conservation Priority Areas: Lessons Learned J Supriatna, Y De Fretes, I Wijayanto, A Galt, T Sigaty, M Vinton World Commission on Protected Areas, Second Southeast Asian Regional Forum 2 …, 2000 | 2 | 2000 |
| The Ecology of Nusa Tenggara and Malaku Y De Fretes, G Reksodihardjo-Lilley, KA Monk Oxford University Press; Periplus Editions, 1997 | 2 | 1997 |
| Keanekaragaman Katak di Sekitar Pegunungan Arfak I Indrayani, K Krey, Y De Fretes Pemda Papua Barat, 2020 | | 2020 |
| Keakaragaman Odonata di Sekitar Pegunungan Arfak, Papua Barat K Krey, A Pattiran, A Kilmaskossu, Y De Fretes Pemda Papua Barat, 2020 | | 2020 |
