“…This article is an expanded version of Tibken [2002]. For a different approach to the same problem using the theorem of Ehlich and Zeller see Warthenpfuhl and Tibken [2008].…”
“…This article is an expanded version of Tibken [2002]. For a different approach to the same problem using the theorem of Ehlich and Zeller see Warthenpfuhl and Tibken [2008].…”
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