@InCollection{Grue08,
 author        = {K. Grue},
 year          = {2008},
 title         = {A {G}entle {I}ntroduction to {M}ap {T}heory},
 editor        = {Robering, Klaus},
 booktitle     = {New Approaches to Classes and Concepts},
 publisher     = {College Publications},
 address       = {London},
 series        = {Studies in Logic},
 volume        = {14},
 pages         = {87--110},
 month         = nov
}