{{cite web | url=http://www.europeana.eu/resolve/record/03486/0F9DE0A0A042E1AB8D3318AC01A167A4AAFB595E|title=Libellus Linconiensis de phisicis lineis, angulis et figuris, per quas omnes actiones naturales complentur|author=Grosseteste, Robertus|accessdate=2013-05-23 |publisher=Europeana}}

<ref>{{cite web | url=http://www.europeana.eu/resolve/record/03486/0F9DE0A0A042E1AB8D3318AC01A167A4AAFB595E|title=Libellus Linconiensis de phisicis lineis, angulis et figuris, per quas omnes actiones naturales complentur|author=Grosseteste, Robertus|accessdate=2013-05-23 |publisher=Europeana}}</ref>