@techreport{Long:1981,
	key = "Long 1981",
	author = "D. Long",
	title = "Random equivalence of factorization and computation of
	orders",
	institution = "Princeton University, Department of Electrical
	Engineering and Computer Science",
	number = 284,
	month = "April",
	year = 1981}

@article{Shallit&Shamir:1985,
	key = "Shallit and Shamir 1985",
	author = "J. O. Shallit and A. Shamir",
	title = "Number-theoretic functions which are equivalent to
	number of divisors",
	journal = IPL,
	volume = 20,
	year = 1985,
	pages = "151-153"}

@techreport{Shallit:1988,
	key = "Shallit 1988",
	author = "J. O. Shallit",
	title = "Reduction of $d(N)$ to $\sigma_k (N)$",
	institution = "University of Chicago, Department of Computer Science",
	number = "88-001",
	month = "January",
	year = "1988"}

@article{Landau:1988,
	key = "S. Landau 1988",
	author = "S. Landau",
	title = "Some remarks on computing the square parts of integers",
	journal = IC,
	volume = 78,
	year = 1988,
	pages = "246-253"}

@article{Lee&Madachy:1972,
	key = "Lee and Madachy 1972",
	author = "E. J. Lee and J. S. Madachy",
	title = "The history and discovery of amicable numbers",
	journal = JRM,
	volume = 5,
	year = 1972,
	pages = "77-93; 153-173; 231-249"}

@incollection{te.Riele:1982,
	key = "te Riele 1982",
	author = "Riele, H. J. te",
	title = "Perfect numbers and aliquot sequences",
	booktitle = "Computational Methods in Number Theory",
	series = "Amsterdam Math. Centre Tracts",
	editor = "Lenstra, Jr., H. W. and R. Tijdeman",
	volume = 154,
	year = 1982,
	pages = "141-157"}