@incollection{Petracca20,
author = {Giovanni Petracca and Francesco Zappia and Fabrizio Silvaggio},
title = {Gallstones Ileus},
booktitle = {Intestinal Obstructions},
publisher = {IntechOpen},
address = {Rijeka},
year = {2020},
editor = {Dmitry Victorovich Garbuzenko},
chapter = {3},
doi = {10.5772/intechopen.93576},
url = {https://doi.org/10.5772/intechopen.93576}
}