Studi on the in vitro release of ibuprofen from xanthan gum matrix combined with a crosslinking agent - Hadisoewignyo, Lannie; Faculty of Pharmacy Unika Widya Mandala Surabaya Jl. Dinoyo 42 – 44 Surabaya – 60265, Phone. 031-70007576 (Faculty of Pharmacy Universitas Gadjah Mada, Yogyakarta, Skip Utara, 55281, Indonesia, 2007)