I had a look at the wikipedia entry's citations, and they're available in English. They're basically testimonials, which is not really what skeptics are looking for in terms of 'convince me.'
For perspective, when a magician does a trick in front of an audience of 300 people, if we ask them all to sign an affadavit of what they saw, it would be a 'well documented' paranormal event, just like this one. It would not, however, be a well-investigated paranormal event.
Technically, there are many more much better-documented paranormal events today - we film them on television. Go down to the video store and compare a Penn & Teller video with its closeups and multiple-camera angle views to the weak footage obtained during the Rosenheim documentation.
One of the investigation protocols that we apply for our investigations is that there should be fewer investigators, and they should not consult one another during the investigation. The more people you get concentrated together, the more groupthink you get. When one person thinks he sees something that the others don't, it's natural for the others to later misremember that they saw it too.
The more people; the more imaginary sightings and the more misrememberings by the others until there's an orgy of evidence that maybe nobody even really saw.
That's why photography or video is a better measure of what actually happened than retrospective testimonials, although vulnerable to other problems. It's not unusual to have a situation where everybody writes down what they remember happened, but the video proves that they're just plain mistaken.
I'll have to locate a copy of the Asimov reference. This is an old case, so it may be that organized skepticism punted this one in the '70s, and we haven't heard much about it since. I'll also scan the indexes in my Nickell books. That sounds like his type of subjectmatter. This might not be so much actively avoided by skeptics as it could be a dead horse -slash- blast from the past.