Two path relations: Along and past

@inproceedings{pub1489,
    author = {

Baus, Jörg
 and 

Kray, Christian
 and 

Zimmer, H
 and 

Speiser, H
 and 

Krüger, Antonio
},
    title = {Two path relations: Along and past},
    booktitle = {Proceedings of COSIT 2001. Conference on spatial information theory (COSIT-2001)},
    year = {2001}
}