↑(en) Simon Reynolds, Energy Flash : A Journey Through Rave Music and Dance Culture, Soft Skull Press, , The dominant style at Hard Summer, provided by artists like Zedd, Erol Alkan and Bloody Beetroots, is what's been tagged 'electro house', although to my ears it has little relationship with either house or electro (in the original eighties 808-bass-bumping sense)..
↑(en) Susie Dent, The Language Report, , Electro itself is a musical style blending "funk & synthesizers with elements of hip-hop".