Combined crossbred and purebred selection in animal breeding : DIZ / Ming Wei . Wageningen :  Landbouwuniversiteit , 1992 . 159 s . ISBN 90-5485-056-6 . [1, of that borrowed 0]

Food, crop pests, and the environment ; The need and potential for biologically intensive integrated pest management / Editors Frank G. Zalom ; William E. Fry . St. Paul :  APS Press , 1992 . 179 s . ISBN 0-89054-140-X . [1, of that borrowed 0]

Transformační řízení / Jaroslav Jirásek . Praha :  GRADA , 1993 . 288 s . ISBN 80-85623-71-4 . [1, of that borrowed 0]