of K.Schmidt's paper.

of N.Chapin's paper.

of C.Whitby-Strevens' and E.E.Balkovich's paper.

of G.R.Gromov's and M.A.Roytberg's paper.

of D.J.Reifer's and R.E.Loesh's paper.

of T.Kurosawa's paper.

of K.Omaki's, Y.Mano's and K.Torii's paper.

of Y.Mano's paper.

of H.Uchida's and T.Mouri's paper.

of L.Pietschker's paper.

of J.Gurd's, J.Glauert's and C.Kirkham's paper.

of R.Steinbrueggen's paper.

of U.Fauser's paper.

of I.Jacobson's paper.

of R.Nakai's and R.Yamakawa's paper.

of A.J.Catto and J.R.Gurd's paper.

of G.Fischer's and G.Szwillus' paper.

of R.Nakajima's and T.Yuasa's paper.

of M.Gourgand's, M.Schneider's and A.Tangui's paper.

of M.Engelien's paper.