1999

• Ng, H.H. 1999. Laides longibarbis, a valid species of schilbeid catfish from Indochina (Teleostei: Siluriformes). Ichthyological Exploration of Freshwater 10(4): 381–385. Reference page. 

2015

• Ng, H. H., Hadiaty, R. K., Lundberg, J. G. & Luckenbill, K. R., 2015: A new genus and species of bagrid catfish from northern Sumatra (Siluriformes: Bagridae). Proceedings of the Academy of Natural Sciences of Philadelphia 164 (1): 149–157. DOI: 10.1635/053.164.0112

• Ng, H. H. & Jiang, W., 2015: Intrafamilial relationships of the Asian hillstream catfish family Sisoridae (Teleostei: Siluriformes) inferred from nuclear and mitochondrial DNA sequences. Ichthyological Exploration of Freshwaters 26 (3): 229–240. Abstract Reference page. 
• Ng, H. H., 2015: Phylogenetic systematics of the Asian catfish family Sisoridae (Actinopterygii: Siluriformes). Ichthyological Exploration of Freshwaters 26 (2): 97–157. Abstract Reference page. 

2016

• Ng, H.H. & Ferraris, C.J. Jr. 2016. A new species of anguilliform catfish (Actinopterygii: Siluriformes: Bagridae) from Bangladesh and northeastern India. Zootaxa 4079(3): 381–387. DOI: 10.11646/zootaxa.4079.3.6 .Reference page. 
• Ng, H.H., Lalramliana & Lalronunga, S. 2016. A new diminutive sisorid catfish (Actinopterygii: Siluriformes) from northeastern India. Zootaxa 4105(2): 546–556. DOI: 10.11646/zootaxa.4105.6.2 Reference page. 

• Ng, H.H., Lalramliana & Lalronunga, S. 2016. A new diminutive sisorid catfish (Actinopterygii: Siluriformes) from northeastern India. Zootaxa 4105(6): 546–556. DOI: 10.11646/zootaxa.4105.6.2 . Reference page. 

2017

• Ng, H.H. & Kottelat, M. 2017. The Glyptothorax of the Bolaven Plateau, Laos (Teleostei: Sisoridae): new and endangered. Zootaxa 4238(3): 406–416. DOI: 10.11646/zootaxa.4238.3.7 . Reference page. 

2018

• Ng, H.H. 2018. Exostoma ericinum, a new glyptosternine catfish from southwestern China (Teleostei: Siluriformes: Sisoridae). Zootaxa 4420(3): 405–414. DOI: 10.11646/zootaxa.4420.3.6 Reference page.