Tense Logic Without Tense Operators

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\begin{bibtex} @article{DBLP:journals/mlq/Wolter96,

 author    = {Frank Wolter},
 title     = {Tense Logic Without Tense Operators},
 journal   = {Math. Log. Q.},
 volume    = {42},
 year      = {1996},
 pages     = {145-171},
 bibsource = {DBLP, http://dblp.uni-trier.de}

}

\end{bibtex}