Manuscripts for which we do not receive authors' answers will be discarded after six months because of space limitations. If you also state date and content of the last communication you received from us, we will be able to answer more rapidly. Hopefully, future technology and conditions will allow us to process manuscripts electronically, but it is not possible at this time. Printing and sending manuscripts to reviewers is far beyond our means. Most visitors of this page are looking for scientific papers and want a quick download.
Impressive graphics are very slow to transmit.
For videos and many photographs, check tbe virtual visit to the tropics in our Homepage.