On intersection and symmetric difference of families of boundary classes in the problems on colouring and on the chromatic number
Dmitriy Sergeevich Malyshev · Discrete Mathematics and Applications · 2011
Article On intersection and symmetric difference of families of boundary classes in the problems on colouring and on the chromatic number was published on May 1, 2011 in the journal Discrete Mathematics and Applications (volume 21, issue 5-6).