Notes
1 Unfortunately, the final version of Ruey-Lin's article arrived too late to be taken into consideration.
2 This is a side point, but I can't resist. The topic of reassembled vehicles is of enormous importance, and I wonder why there hasn't been more interest in the topic. For example, the auto rickshaw is ubiquitous in much of Asia and is not uncommon in other continents as well. In fact, it has been one of the most important modes of urban transport in the post–World War II world.