Chao, N. L. 1992a. Ornamental fishes and fisheries of the Rio Negro. Tropical Fish Hobbyist 40(12):84-102. (August, 1992)
Chao, N. L. 1992b. Into the Flooded Forest. Tropical Fish Hobbyist, 41(2):94-110. (#440, October, 1992)
Chao, N. L. 1992c. Exploring the Rio Demini in the dry season. Tropical Fish hobbyist, 41(3):131-146. (#441, November, 1992)
Chao, N. L. 1992d. Diversity and conservation of ornamental fishes - the gems from flooded forests in Amazonia. Canadian Biodiversity, 2 (2):2-7. (summer, 1992)
Chao, N. L. 1993 Conservation of Rio Negro ornamental fishes. Tropical Fish Hobbyist 41 (5):99-114. (January, 1993)
Chao, N. L. 1994. Project Piaba. Aquatic survival, 3(1), p. 12.
Chao, N. L. e S. Prada-Pedreros. 1995. Diversity and conservation of ornamental fishes and fishery of Rio Negro, Amazonas, Brazil. p.241-260 in C.W. Voigtlander (ed.) Theme 3. Protection of aquatic biodiversity. Proceedings of World Fisheries Congress, May 3-8, 1992, Athens, Greece. Oxford & IBH Publ. New Delhi.
Chao, N. L. e S. Prada-Pedreros. 1995 O cardinal tetra, Paracheirodon axelrodi, e diversidade dos peixes ornamentais do Rio Negro, Amazonas. p.35-51. Anais do VII Congresso Brasileiro de Engenharia de Pesca, Santos-SP, 22 a 26 de julho de 1991. Associaç o dos Engenheiros de pesca de Pernambuco, Recife, 1994.
Chao, N. L. 1995 Ornamental fish resources of Amazonia and aquatic conservation. Conference Proceedings of AQUARAMA '95, Singapore, 25-28 May, 1995, p. 31-40.
Chao, N. L. 1995-1996 (in 3 parts). Ornamental fish resources of Amazonia and aquatic conservation. OFI Journal, Part 1. Species diversity, No. 12, p.10-12 (August, 1995); Part 2. Protection and aquatic conservation, No. 13, p. 4-5 (November, 1995); Part 3. List of Species that can be captured, commercialized and exported legally from Brazil, No. 14, p.12-13 (February, 1995)
Chao, N. L. 1996. Saving the rain forest’s endangered ornamentals. Today’s Aquarist. 6(6):4-8.:: Chao, N. L. 1996. Project Piaba - Update.
Aquatic Survival, 5(1):15-16.
Chao, N. L. And G. Prang. 1997. Project Piaba – towards a sustainable ornamental fishery in the Amazon. Aquarium Sciences and Conservation, 1, 105-111pp.:: Kullander, S. & S. Prada-Pedreros. 1993. Nannacara adoketa, a new species of cichlid fish from the Rio Negro in Brazil. Ichtyol. Explor. Freshwaters, 4 (4):357-366.
Prang, G. 1996. Pursuing the sustainable development of wild caught ornamental fishes in the middle Rio Negro, Amazonas, Brazil. Aquatic Survival, 5 (1): 1, 6-8.
Prang, G. 1996.The collection and distribution of wild-caught ornamental fishes of the middle Rio Negro, amazonas, Brazil. OFI Jounal, No.16, p.4-5.