BibTeX: Highlight selected references with asterisk (or special symbol)

Question

I have a tex file and a bib file and want to highlight one of the two references with an asterisk (*) but I do not want to use \bibitem. Instead I want to incorporate it with an existing bibliography format that is provided by Springer (splncs.bst in my case).

so, the following bibliography should change looking like this:

[1] Adam, A., Boodle, B.: Some Title. In: Some Proceedings Book, Boston, USA, ACM (2014) 10-19

[2] Boodle, B., Cool, C.: Some Other Title. Journal of Something 4 (2014) 47-62

to look like this:

[*1] Adam, A., Boodle, B.: Some Title. In: Some Proceedings Book, Boston, USA, ACM (2014) 10-19

[2] Boodle, B., Cool, C.: Some Other Title. Journal of Something 4 (2014) 47-62

Is this possible?

Here a minimal example:

The example.tex file:

\documentclass{article}
\begin{document}
This is a document. 
\nocite{A,B}
\bibliographystyle{splncs} 
\bibliography{example}
\end{document}

The example.bib file:

@INPROCEEDINGS{A,
  author = {A. Adam and B. Boodle},
  title = {{Some Title}},
  booktitle = {Some Proceedings Book},
  year = {2014},
  pages = {10-19},
  address = {Boston, USA},
  publisher = {ACM}
}
@ARTICLE{B,
  author = {B. Boodle and C. Cool},
  title = {{Some Other Title}},
  journal = {Journal of Something},
  year = {2014},
  volume = {4},
  pages = {47-62},
  number = {1}
}