@misc{misc4c580624,
title   = {Analysis of permanence time in emotional states: a case study using educational software},
author = {Reis, Helena and Alvares, Danilo and Jaques, Patricia and Isotani, Seiji},
year = {2018},
doi = {10.1007/978-3-319-91464-0_18},
publisher = {Springer},
booktitle   = {International Conference on Intelligent Tutoring Systems - ITS}
}