Please do not transmit electronic data to the publisher until your manuscript has been reviewed and accepted for publication. Please follow the instructions below. Manuscript preparation General remarks. Winword 6 and Word for Macintosh. For details see Electronic submission of final version .
All manuscripts are subject to copy editing.
There are no page charges for authors although a charge will be made for changes introduced after the manuscript has been set in type. Each paper must be preceded by an abstract presenting the most important results and conclusions. 1 to 5 key words should be supplied after the Abstract for indexing purposes. Essential footnotes to the text should be numbered consecutively and placed at the bottom of the page to which they refer. All symbols representing physically or mathematically variable scalars to be underlined in the manuscript to indicate printing in italic type.