Compact flat manifolds with holonomy group 𝐙 2 ⨁𝐙 2 (II)
Rendiconti del Seminario Matematico della Università di Padova, Tome 101 (1999), pp. 99-136. 
@article{RSMUP_1999__101__99_0,
     author = {Rossetti, J. P. and Tirao, P. A.},
     title = {Compact flat manifolds with holonomy group $\mathbf {Z}_2 \bigoplus \mathbf {Z}_2$ {(II)}},
     journal = {Rendiconti del Seminario Matematico della Universit\`a di Padova},
     pages = {99--136},
     publisher = {Seminario Matematico of the University of Padua},
     volume = {101},
     year = {1999},
     zbl = {0970.53029},
     language = {en},
     url = {http://archive.numdam.org/item/RSMUP_1999__101__99_0/}
}
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Rossetti, J. P.; Tirao, P. A. Compact flat manifolds with holonomy group $\mathbf {Z}_2 \bigoplus \mathbf {Z}_2$ (II). Rendiconti del Seminario Matematico della Università di Padova, Tome 101 (1999), pp. 99-136. http://archive.numdam.org/item/RSMUP_1999__101__99_0/

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