Clark, F., 1978. Some records of fleas (Siphonaptera) from English birds and mammals. Entomologist?s Gazette 29(4): 258-260., p.79.

Clark, F., 1989. Studies on three congeneric species of fleas [Ceratophyllus] (Siphonaptera) from the nests of Delichon urbica urbica in England.  (Abstract). Index to Theses Accepted for Higher Degrees in the Universities of Great Britain and Ireland 38(1): 267 and Dissertation Abstrs International B 50(1): 48-B., p.80.

Clark, F., 1998. Prevalence of the cat flea Ctenocephalides felis and oocyte development during autumn and winter in Leicester City, U.K. Medical and Veterinary Entomology 13(2): 217-218., p.81.

Clark, F. & Hill, L.A., 1999. The colonisation of artificial house martin (Delichon urbica L.) nests by ectoparasites (Siphonaptera: Diptera: Hemiptera: Acari). Entomologist?s Monthly Magazine 135: 237-240., p.82.

Clark, F. & McNeil, D.A.C., 1981. Geographical distribution of house martin fleas in Leicestershire. Transactions of the Leicester Literary and Philosophical Society 75: 11-17., p.83.

Clark, F. & McNeil, D.A.C., 1981. The variation in population densities of fleas in house martin nests in Leicestershire. Ecological Entomology 6(4): 379-386., p.84.

Clark, F. & McNeil, D.A.C., 1984. Records of fleas from nests of house martins (Delichon urbica urbica (L.)) in Cornwall and Derbyshire. Entomologist?s Monthly Magazine 120: 59-62., p.85.

Clark, F. & McNeil, D.A.C., 1991. Temporal variation in the population densities of fleas in house martin nests (Delichon u. urbica) (Linnaeus) in Leicestershire, UK. Entomologist?s Gazette 42(4): 218-288., p.86.