Citations refer to the original publication, not to a Scieee localized version.
Kropatsch, W. G., & Molina Abril, H. (2009). Open Issues and Chances for Topological Pyramids. PRIP, Vienna University of Technology. https://idus.us.es/items/2cef8b45-6904-4aec-86be-7b958b12dd00
Kropatsch, Walter G., and Helena Molina Abril. Open Issues and Chances for Topological Pyramids. PRIP, Vienna University of Technology, 2009. https://idus.us.es/items/2cef8b45-6904-4aec-86be-7b958b12dd00.
Kropatsch, Walter G., and Helena Molina Abril. Open Issues and Chances for Topological Pyramids. PRIP, Vienna University of Technology, 2009. https://idus.us.es/items/2cef8b45-6904-4aec-86be-7b958b12dd00.
Kropatsch, W. G. and Molina Abril, H. (2009) Open Issues and Chances for Topological Pyramids. PRIP, Vienna University of Technology. Available at: https://idus.us.es/items/2cef8b45-6904-4aec-86be-7b958b12dd00.
W. G. Kropatsch and H. Molina Abril, “Open Issues and Chances for Topological Pyramids,” PRIP, Vienna University of Technology, 2009. [Online]. Available: https://idus.us.es/items/2cef8b45-6904-4aec-86be-7b958b12dd00
@misc{kropatsch2009open,
author = {Kropatsch, Walter G. and Molina Abril, Helena},
title = {Open Issues and Chances for Topological Pyramids},
year = {2009},
publisher = {PRIP, Vienna University of Technology},
url = {https://idus.us.es/items/2cef8b45-6904-4aec-86be-7b958b12dd00}
}
The source metadata has no journal, volume or pages. Add them from the original publication if your citation needs them.