Submission of a paper implies that it has not been published previously, that it is not under consideration for publication elsewhere, and that if accepted it will not be published elsewhere in the same form, in English or in any other language, without the written consent of the publisher.
All articles are refereed.
The Editors reserve the right to edit or otherwise alter all contributions but authors will receive proofs for approval before publication. Shorter Items A viewpoint section exists for the expression of opinion, and allows authors to submit material which may not be appropriate for full length articles but contains ideas worthy of publication. Viewpoints should comprise 1500-2500 words. Manuscripts must be typewritten, double-spaced with wide margins on one side of white paper. Good quality printouts with a font size of 12 or 10 pt are required.