Dikran Dikranjan, \emph{van Douwen's problems related to the Bohr topology}, Proceedings of the Ninth Prague Topological Symposium (Prague, 2001), Topology Atlas, Toronto, 2002, pp. 37--50. arXiv:math.GN/0204120 @incollection {math.GN/0204120, author = {Dikranjan, Dikran}, title = {van {D}ouwen's problems related to the {B}ohr topology}, pages = {37--50}, booktitle = {Proceedings of the Ninth Topological Symposium (Prague, 2001)}, publisher = {Topology Atlas}, address = {Toronto}, year = {2002}, editor = {Petr Simon}, arxivnumber = {math.GN/0204120}, note = {arXiv:math.GN/0204120}, mrclass = {05D10 20K45 (22A05 54H11)}, }