• https://cdn.bootcdn.net/ajax/libs/nvd3/1.8.1-alpha/nv.d3.css
• https://cdn.bootcdn.net/ajax/libs/nvd3/1.8.1-alpha/nv.d3.js
• https://cdn.bootcdn.net/ajax/libs/nvd3/1.8.1-alpha/nv.d3.min.css
• https://cdn.bootcdn.net/ajax/libs/nvd3/1.8.1-alpha/nv.d3.min.js