Italian online fashion retailer Yoox is looking to further revenue growth for the end of the year after strong sales in the first nine months confirmed the vigor of the luxury industry despite wider economic woes in Europe. Yoox, which powers sites for top brands such as Valentino and Roberto Cavalli alongside its own multibrand online stores, said core earnings rose 20.2 percent to 11.8 million euros ($16 million) in the nine months ended in September.