Generate text that is semantically similar to this text: switzerland 's trade and diplomatic relations with the islamic republic have been criticized in recent months after foreign minister micheline calmy-rey traveled to tehran in march 2008 to sign a gas deal .
switzerland 's trade and diplomatic relations with iran have been criticized in recent months after foreign minister micheline calmy-rey traveled to tehran in march 2008 to sign a deal with iran 's state gas firm .