I don't think it's an Anthurium. Those I am a bit more familiar with.
Don't know why the link you provided shows a solid green leaf/compared to googling and those images show a white stripe other than the plant shown in the article is not D. oerstedii . If you read the last sentence the author suggests this may be possible for the last photo of a different Dief. so why not this one too ?
Of the other two your showing D. longispatha looks most like it.
Maybe put on the plant ID forum. Some pretty good folks over there that figure these mystery plants out quick !
