@article{Breiger1986,
author = {Breiger, Ronald L. and Pattison, Philippa E.},
doi = {10.1016/0378-8733(86)90006-7},
issn = {03788733},
journal = {Social Networks},
pages = {215-256},
title = {Cumulated social roles: The duality of persons and their algebras},
volume = {8},
number = {3},
year = {1986}
}

@book{kent1978rise,
author = {Kent, D V},
publisher = {Oxford University Press},
title = {{The rise of the Medici: faction in Florence, 1426-1434}},
url = {https://books.google.se/books?id=2m1oAAAAMAAJ},
year = {1978}
}