Please find enclosed our manuscript, “[manuscript title]” by [first author's name] et al., which we would like to submit for publication as a [publication type] in [name of the journal].
To our knowledge, this is the first report showing…
We believe our findings would appeal to the readership of [journal name].
Please address all correspondence to:
We look forward to hearing from you at your earliest convenience.
All cover letters should contain these sentences:
We confirm that this manuscript has not been published elsewhere and is not under consideration by another journal.
All authors have approved the manuscript and agree with its submission to [insert the name of the target journal].
Source :http://www.springer.com/authors/journal+authors/journal+authors+academy?SGWID=0-1726414-12-837827-0
How to write and publish your scientific paper
http://www.springer.com/gp/authors-editors/journal-author/journal-author-academy?token=prtst0416p