Expert systems for environmental screening ; An application in the lower Mekong basin / Kurt Fedra, Lothar Winkelbauer, Vedurumudi R. Pantulu . Laxenburg :  International Inst. for applied systems analysis , 1991 . 169 s . ISBN 3-7045-0114-X . [1, of that borrowed 0]

The little, Brown handbook / Ramsey H. Fowler . Boston :  Little Brown and Co. , 1986 . 650 s . ISBN 0-673-39209-0 . [1, of that borrowed 0]