Retrieved 28 Feb 2013. ↑ "A List Apart: Dive into Responsive Prototyping with Foundation". Retrieved 22 Aug 2012. ↑ "Zurb releases Foundation 4, a mobile-first, 'forward-thinking dev/designer's dream'". Retrieved 28 Feb 2013. ↑ "Why we dropped Zepto". ↑ Foundation Documentation on Thursday, April 30, 2015 ↑ Foundation Getting Started on Thursday, April 30, 2015 ↑ Foundation Getting Started on Thursday, April 30, 2015 ↑ Foundation Getting Started on Thursday, April 30, 2015