Authors are requested to submit electronic versions of the manuscripts, in order to facilitate an accurate typesetting, once the papers are accepted for publication. Manuscripts must be submitted in a medium that is accessible under Microsoft Windows, such as 3.5" floppy diskettes in PC format, CD-R, or Zip disks in PC format. Manuscripts that are typeset using either LaTex or Microsoft Word are acceptable. Detailed instructions for preparing the manuscripts, including the format and styles, can be down-loaded from this web-site. Authors are encouraged to use either the customized LaTex macro or the template for Microsoft Word, both of which can be down-loaded by following this link, to prepare the final version of their manuscripts. Authors are requested to submit their manuscript in LaTex source files (including the non-standard macro packages used), or in Word Document Format, to facilitate an accurate tyepsetting. Authors may elect to submit two versions of manuscript, one for the printed version of SID, and the other for the on-line version of SID. Illustrations in colour may be used only in the on-line version of the manuscripts.