My early papers are on modelling multicell tumour spheroids .
Spheroids are roughly spherical aggregations of cells grown in the laboratory.
They display many of the features of tumour growth in vivo and are currently the focus of many experimental an theoretical projects world-wide. I also looked at vascular compression in cancers. In 1985, David Balding and I developed the first model of tumour-induced angiogenesis. This model has been extended by many researchers and has also been applied to wound-healing. I have also examined invasion processes and have several papers on trophoblast plantation into the wall of the uterus.