On Cohen-Macaulay modules over surface singularities
  A description of Cohen-Macaulay modules over cusp surface singularities and over unimodule hypersurface singularities of type T is given. It is proved that among minimally elliptic singularities and their quotients only simple elliptic and cusps are tame, all others are wild (with respect to the classification of Cohen-Macaulay modules). 
Yuriy Drozd, Gert-Martin Greuel, Irina Kashuba