mn2e.bst is the bibliography style file used for the latex2e Monthly Notices of the Royal Astronomical Society style file.
An early version is distributed by Blackwell Scientific.
This style file was originally written by John Sleath and Tim Jenness at the Mullard Radio Astronomy Observatory in the summer of 1995. It was derived from the astron.bst and apalike.bst files.
Norman Gray provided the multi-author style fixes.