Approximability Distance in the Space of <i>H</i>-Colourability Problems.

Tommy Färnqvist Peter Jonsson Johan Thapper Approximability Distance in the Space of <i>H</i>-Colourability Problems. 92-104 2009 CSR http://dx.doi.org/10.1007/978-3-642-03351-3_11 conf/csr/2009 db/conf/csr/csr2009.html#FarnqvistJT09