Submission of a paper will be held to imply that it is original work and that it has not already been published or submitted for publication elsewhere.
Submission is free of charge.
Authors of accepted articles which contain tables, diagrams, illustrations or mathematical formulae are requested to consult the editors about presentation requirements. Authors will receive ten free offprints of their article. They should be accompanied by an abstract of about sixty words and a list of keywords indicating the contents of the article. The abstract should summarize the content as well as act as a lead-in to the article. Because papers are refereed anonymously, there should be no identifying marks of any kind and only the title of the article should appear on the first page.