Jefferson, T.A., Karczmarski, L., Kreb, D., Laidre, K., O’Corry-Crowe, G., Reeves, R.R., Rojas-Bracho, L., Secchi, E., Slooten, E., Smith, B.D., Wang, J.Y. & Zhou, K.2008. Orcaella brevirostris (Mahakam River subpopulation). The IUCN Red List of Threatened Species 2008: e.T39428A10237530. http://dx.doi.org/10.2305 /IUCN.UK.2008 .RLTS. T39428A10237530.en
Kreb, D. (1999) Observations on the occurrence of Irrawaddy dolphin, Orcaella brevirostris, in the Mahakam River, East Kalimantan, Indonesia. Zeitschrift für Säugetierkunde, 64, 54–58.
Thomas, P.O.,Gulland, F.M., Kreb, D., Ding, W., Smith, B., Malik, M.I., Ryan, G.E., Phay, S. 2019). A review of electrofishing as a potential threat to freshwater cetaceans. Endangered Species Research Volume 39: 207. download at https://www.int-res.com/journals/esr/specials/marine-vertebrate-bycatch-problems-and-solutions/
Coastal environmental education materials, see Fact sheets & https://bit.ly/3d677lx
Budiono and Kreb, D. (2009) GNF final report on the community-based reforestation feasibility study of Lake Jempang shores in East Kalimantan, Indonesia. Yayasan Konservasi RASI, Samarinda, Indonesia.
Yayasan Konservasi RASI (2005-2023) Annual series of technical Reports: Abundance and threats monitoring of Pesut Mahakam. Only available upon request and stated objective.
D. Kreb, Rosano, R.A., Paisal, Jusmaldi. 2021. Pinger evaluation studies in the Mahakam River, Indonesia July 2020-January 2021. (Only Available Upon Request)
Kreb, D. & Lim, I.S. (2009) Balikpapan Bay Irrawaddy dolphin Project 2008. Final Technical Report. Conservation and diversity of cetaceans in and near Balikpapan Bay, East Kalimantan, Indonesia.
Kreb, D. 2010. Final technical report on underwater noise mitigation and dolphin monitoring during percussive piling activity by PT DKI in Muara Tempadung, Balikpapan Bay, East Kalimantan.
Kreb, D. & Budiono (2013). Preliminary Survey on the Occurrence of Marine Mammals In NW Tunu Seismic Area in the Mahakam Delta of East Kalimantan, Indonesia. Technical Report submitted to TEPI.