The ScienceDirect e-journals and e-books service will be unavailable for a short time early in the morning on Sunday 21 July.

It is also possible that you may experience service disruptions such as slower response times and unexpected outages throughout the day.

ScienceDirect thank you for your patience as they update their products. If you would like to find out more you can follow them on Twitter @sciencedirect or via their blog.