_:ne63b6db7ad4a4a8190980479d721ee3fxb7
<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>
<https://link.springer.com/article/10.1007/BF01570040?error=cookies_not_supported&error=cookies_not_supported&code=48d22aec-108a-4aae-be17-67d6e36755ec&code=4751fdb8-f9ae-4e95-b0e2-7835051605d9>