@book{11390cd9c6024a0c9f25b431091b4516,
title = "Three-Class Association Schemes",
abstract = "We study (symmetric) three-class association schemes.The graphs with four distinct eigenvalues which are one of the relations of such a scheme are characterized.We give an overview of most known constructions, and obtain necessary conditions for existence.A list of feasible parameter sets on at most 100 vertices is generated.",
keywords = "wage differentials, international trade",
author = "{van Dam}, E.R.",
note = "Pagination: 36",
year = "1997",
language = "English",
volume = "744",
series = "FEW Research Memorandum",
publisher = "Operations research",
}