Zhou, L., Xu, D., Li, Y., Pan, Q., Wang, J., Xue, L. and Howard, A. (2019) Phosphorus and nitrogen adsorption capacities of biochars derived from feedstocks at different pyrolysis temperatures. Water, 11 (8). 1559. ISSN 2073-4441 doi: https://doi.org/10.3390/w11081559

Howard, A. and Xu, D., eds. (2016) Constructed wetlands systems and management. Water (Special Issue), 8. MDPI. ISBN 2073-4441

Xu, D., Wang, L., Huili, L., Howard, A., Guan, Y., Jiuhai, L. and Hui, X. (2015) The forms of bioavailability of phosphorus in integrated vertical flow constructed wetland with earthworms and different substrates. Chemosphere, 134. pp. 492-498. ISSN 0045-6535 doi: https://doi.org/10.1016/j.chemosphere.2015.04.099

Xu, D., Wu, Y., Li, Y., Howard, A., Jiang, X., Guan, Y. and Gao, Y. (2014) Influence of UV radiation on chlorophyll, and antioxidant enzymes of wetland plants in different types of constructed wetland. Environmental Science and Pollution Research, 21 (17). pp. 10108-10119. ISSN 0944-1344 doi: https://doi.org/10.1007/s11356-014-2909-5

Xu, D., Li, Y., Howard, A. and Guan, Y. (2013) Effect of earthworm Eisenia fetida and wetland plants on nitrification and denitrification potentials in vertical flow constructed wetland. Chemosphere, 92 (2). pp. 201-206. ISSN 0045-6535 doi: https://doi.org/10.1016/j.chemosphere.2013.03.016

Xu, D., Li, Y. and Howard, A. (2013) Influence of earthworm Eisenia fetida on removal efficiency of N and P in vertical flow constructed wetland. Environmental Science and Pollution Research, 20 (9). pp. 5922-5929. ISSN 1614-7499 doi: https://doi.org/10.1007/s11356-013-1860-1

Howard, A. (2012) Toxic cyanobacteria. In: Bengstsson, L., Herschy, R. and Fairbridge, R. (eds.) Encyclopedia of lakes and reservoirs. Springer. ISBN 9781402056161

Guven, B. and Howard, A. (2011) Sensitivity analysis of a cyanobacterial growth and movement model under two different flow regimes. Environmental Modeling and Assessment, 16 (6). pp. 577-589. ISSN 1573-2967 doi: https://doi.org/10.1007/s10666-011-9266-2

Guven, B. and Howard, A. (2010) Analytical modelling of cyanobacterial surface blooms in rivers. In: The 8th International Conference on Toxic Cyanobacteria (ICTC8), 29 August - 4 September 2010, Istanbul, Turkey. (Unpublished)

Howard, A. (2007) The Don McLean Story: Killing Us Softly With His Songs. Lulu Press, pp420. ISBN 9781430306825

Guven, B. and Howard, A. (2007) Identifying the critical parameters of a cyanobacterial growth and movement model by using generalised sensitivity analysis. Ecological Modelling, 207 (1). pp. 11-21. ISSN 0304-3800 doi: https://doi.org/10.1016/j.ecolmodel.2007.03.024

Guven, B. and Howard, A. (2006) Modelling the growth and movement of cyanobacteria in river systems. Science of the Total Environment, 368 (2-3). pp. 898-908. ISSN 0048-9697 doi: https://doi.org/10.1016/j.scitotenv.2006.03.035

Guven, B. and Howard, A. (2006) A review and classification of the existing models of cyanobacteria. Progress in Physical Geography, 30 (1). pp. 1-24. ISSN 0309-1333 doi: https://doi.org/10.1191/0309133306pp464ra

Burton, L. R., Howard, A. and Goodall, B. (2003) Construction of a historical Water Pollution Index for the Mersey Basin. Area, 35 (4). pp. 438-448. ISSN 1475-4762