Mathematics of surfaces XII 12th IMA International Conference, Sheffield, UK, September 4-6, 2007 : proceedings /

nork IMA conference on the mathematics of surfaces, Martin, Ralph., Sabin, Malcolm., Winkler, Joab.
Argitaratua 2007.

Mathematics of surfaces XIII 13th IMA International Conference York, UK, September 7-9, 2009 : proceedings /

nork IMA Conference on the Mathematics of Surfaces, Hancock, Edwin R., Martin, R. R., Sabin, M. A.
Argitaratua 2009.