You seem to be attempting to access an item that has been removed from the repository.
There is a later version of the item you are trying to access:
Bose R. P., J. C., van der Aalst, W. M.P., Zliobaite, I. and Pechenizkiy, M., 2011. Handling concept drift in process mining. In: 23rd International Conference on Advanced Information Systems Engineering, June 20-24 2011, London, UK, pp. 391-405.