Roy Williams
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Ashish Mahabal,
Ajit Kembhavi,
Roy Williams,
2011
.
Roy Williams,
Ifeyinwa E. Achumba,
Djamel Azzi,
2008
.
Roy Williams,
Jenny Mackness,
Jutta Pauschenwein,
2015
.
Roy Williams,
2006
.
Roy Williams,
Jenny Mackness,
S. Mak,
2010
.
Roy Williams,
Roy Williams,
2003
.
Roy Williams,
Michele Vallisneri,
Jonah Kanner,
2014,
1410.4839.
Roy Williams,
1983
.
F. Gagliardi,
Paul Messina,
Roy Williams,
1999
.
Roy Williams,
2003
.
Roy Williams,
Jenny Mackness,
Regina Karousou,
2011
.
Roy Williams,
Jenny Mackness,
S. Mak,
2010,
Proceedings of the International Conference on Networked Learning.
Rob Seaman,
Arnold H. Rots,
Matthew J. Graham,
2011
.
Francois Ochsenbein,
Roy Williams,
Jonathan C. McDowell,
2004
.
Roy Williams,
Jenny Mackness,
J. Mackness,
2013
.
Roy Williams,
2000
.
Roy Williams,
Andy Lawrence,
Nicholas A. Walton,
2006,
Proceedings of the International Astronomical Union.