Name the author who published the paper on Machine translation and has the name Richens.
Which author published the paper on Machine translation and has the name Richens?
SELECT DISTINCT ?answer WHERE { <https://dblp.org/rec/journals/cj/Richens58> <https://dblp.org/rdf/schema#authoredBy> ?answer }
<https://dblp.org/rec/journals/cj/Richens58>