Wrong text instead of reference numbers with the spbasic bibiography style

Question

I am writing a paper to a Springer journal and I am trying to use their \bibliographystyle{spbasic} However, instead of the number of the reference in the list of references I get something as:

[Hundsdorfer et al(1995)Hundsdorfer, Koren, van Loon, and Verwer]

followed by the citation

What should I do to get the number in the square brackets?

\documentclass[smallextended]{svjour3}
\begin{document}
\cite{Hundsdorfer:adv}

\bibliographystyle{spbasic} 
\bibliography{moje.bib}   % name your BibTeX data base

\end{document}

I may have to do the bibliography manually, as no Springer provided bibtex style produces the output that can be seen in the journal articles.

Answer 1

The format of the citation, i.e., [Short author(year)Long author] suggests that the bibliography file (.bbl) produced by the bibliography stye spbasic is for natbib. Thus adding

\usepackage[numbers]{natbib}

should address the issue.