J. R. Brandon, Parasites in soil/sludge systems, Sandia Nat. Lab, vol.5, issue.13, 1978.

H. J. Burger, A. Rieso, M. Stoye, D. Heuer, and M. Tauber, Resistance of parasitic eggs, oocysts and larvae in sewage sludge against electron rays, Fourth Int. Congress of Parasitol, 1978.

K. Enigk, P. Holl, and A. Dey-hazra, Eradication of parasitic cysts and eggs in sewage sludge by irradiation with low energy electrons. Zbl. Bakt. Hyg 161, 61±71. Fairbain, D., 1959. The biochemistry of Ascaris, Exp. Parasitol, vol.6, pp.491-554, 1975.

E. W. Foor, Ultrastructural aspects of oocyte development and shell formation in Ascaris lumbricoõÈ des, J. Parasitol, vol.53, pp.1245-1261, 1967.

P. Gaspard, University Henri Poincare ,Nancy. I. HoraÁ k, P., 1994. Experimental destruction of ascarid ova in sewage sludge by accelerated electron irradiation, Wat. Res, vol.28, pp.939-941, 1995.

E. Hess and C. Breer, The importance of sludge disinfection, Gas. Wass. Abwass, vol.56, pp.385-388, 1976.

D. Heuer and E. G. Hofmann, Electron irradiation equipment for sewage sludge disinfection, Gas. Wass. Abwass, vol.120, pp.476-480, 1979.

U. Keller, Sludge disinfection technology, Schweiz Arch. Tierheilk, vol.125, pp.753-770, 1983.

L. N. Melmed and D. K. Comninos, Disinfection of sewage sludge with gamma radiation, National Symposium on Treatment and Disposal of Sludge Deriving from Municipal Sewage, 1977.

X. Q. Meng, S. S. Wang, B. X. Wang, G. H. Ying, X. Y. Li et al., The membranous structure of eggs of Ascaris lumbricoõÈ des as revealed by scanning electron microscopy, Scann. Elect. Microsc, vol.3, pp.187-190, 1981.

L. Monneâ and G. Hoè-nig, On the properties of the egg envelopes of various parasitic nematodes, Arkiv. Zool, vol.7, pp.261-272, 1954.

E. B. Pike, E. G. Carrington, and S. A. Harman, Destruction of Salmonella, enteroviruses and ova of parasites in wastewater sludge by pasteurisation and anaerobic digestion, Wat. Sci. Tech, vol.20, pp.337-343, 1988.

R. S. Reimers, M. D. Little, F. A. England, D. B. Leftwich, D. D. Bowman et al., Parasites in southern sludges and disinfection by standard sludge treatment, 1981.

R. Schuh, W. Philipp, and D. Strauch, In¯uence of sewage sludge with lime treatment on the development of Ascaris suum eggs, Inactivation of Microorganisms in Sewage Sludge by Stabilisation Processes, pp.100-113, 1985.

H. D. Sivinski, Treatment of sewage sludge with combinations of heat and ionizing radiation (thermoradiation), Proceedings of International Atomic Energy Agency, pp.151-167, 1975.

J. E. Ubelaker and V. F. Allison, Scanning electron microscopy of the eggs of Ascaris lumbricoõÈ des, Toxocara canis and Toxocara mystax, J. Parasitol, vol.61, pp.802-807, 1975.

S. Epa, Standards for the use and disposal of sewage sludge, 40 CFR Part 503: Final rules, Federal Register, vol.58, pp.9248-9415, 1993.

D. Wharton, Nematode egg-shells, Parasitol, vol.81, pp.447-463, 1980.

J. G. Yeager and R. L. Ward, Eectiveness of irradiation in killing pathogens, Nat. Symp. for Further Reduction of Pathogens. Sandia Nat. Lab SAND80-2744, pp.80-83, 1980.

J. G. Yeager and R. T. O'brien, Irradiation as a means to minimize public health risks from sludge-borne pathogens, J. Wat. Pollut. Control Fed, vol.55, pp.977-983, 1983.