@inbook{+2012+72+80,
url = {https://doi.org/10.1515/9783110250367.72},
title = {Lecture 6. Four-manifolds with boundary},
booktitle = {Lectures on the Topology of 3-Manifolds},
booktitle = {An Introduction to the Casson Invariant},
publisher = {De Gruyter},
address = {Berlin, Boston},
pages = {72--80},
doi = {doi:10.1515/9783110250367.72},
isbn = {9783110250367},
year = {2012},
lastchecked = {2026-04-29}
}