-
R.Testezlaf e J.P.S.Ramos,
``Head Loss in Screen and Disc Filters'',
ASAE International Winter Meeting,
Estados Unidos,
(1993).
-
J.E.S.Paterniani e L.Di Bernardo,
``Water Treatment by Slow Sand Filtration for Agriculture'',
1993 ASAE International Winter Meeting,
Estados Unidos,
(1993).