Howard, Ken W.F. and ‎Rauf G. Israfilov. Current Problems of Hydrogeology in Urban Areas, Urban Agglomerates and Industrial Centres. Berlin: Springer, 2002.

Howard, Ken W.F. and ‎Rauf G. Israfilov. Current Problems of Hydrogeology in Urban Areas, Urban Agglomerates and Industrial Centres. Berlin: Springer, 2002.