"Alberto Grassi all'Atalanta" [Alberto Grassi is Atalanta] (بالإيطالية). Atalanta's official wbesite. 30 Aug 2016. Archived from the original on 2017-07-31. Retrieved 2016-08-30.
"Alberto Grassi fino al 2020" [Alberto Grassi until 2020] (بالإيطالية). Atalanta's official wbesite. 2 Oct 2015. Archived from the original on 2016-03-04. Retrieved 2015-11-29.
sscnapoli.it
Agorà Telematica - Agorà Med - S.r.l. "Prima Squadra - SSC Napoli". www.sscnapoli.it. مؤرشف من الأصل في 2016-02-29. اطلع عليه بتاريخ 2016-02-02.
Agorà Telematica - Agorà Med - S.r.l. "Prima Squadra - SSC Napoli". www.sscnapoli.it. مؤرشف من الأصل في 2016-02-29. اطلع عليه بتاريخ 2016-02-02.
"Alberto Grassi all'Atalanta" [Alberto Grassi is Atalanta] (بالإيطالية). Atalanta's official wbesite. 30 Aug 2016. Archived from the original on 2017-07-31. Retrieved 2016-08-30.
"Alberto Grassi fino al 2020" [Alberto Grassi until 2020] (بالإيطالية). Atalanta's official wbesite. 2 Oct 2015. Archived from the original on 2016-03-04. Retrieved 2015-11-29.