Quark effects in the gluon condensate contribution to the scalar glueball correlation function

Eremenko M.N., Zasetsky A.Y., Sloan J.J., Petelina S.V., Llewellyn E.J., Karlsson B., Rinsland C.P.

Rae I.J., Fenrich F.R., Lester M., Mcwilliams K.A., Scudder J.D.