@book{Koblitz:1984,
	key = "Koblitz 1984",
	author = "N. Koblitz",
	title = "$p$-adic Numbers, $p$-adic Analysis, and Zeta-Functions",
	publisher = SV,
	year = 1984,
	edition = "2nd"}

@book{Gouvea:1993,
	key = "{Gouv\^ea} 1993",
	author = "F. Q. {Gouv\^ea}",
	title = "$p$-adic Numbers",
	publisher = SV,
	year = 1993}

@book{Herstein:1975,
	key = "Herstein 1975",
	author = "I. N. Herstein",
	title = "Topics in Algebra",
	publisher = "Wiley",
	address = NY,
	edition = "2nd",
	year = "1975"}

@book{Jacobson:1974,
	key = "Jacobson 1974",
	author = "N. Jacobson",
	title = "Basic Algebra I",
	publisher = "W. H. Freeman",
	address = "San Francisco",
	year = 1974}

@book{Hungerford:1974,
	key = "Hungerford 1974",
	author = "T. W. Hungerford",
	title = "Algebra",
	publisher = SV,
	year = 1974}

@book{Zariski&Samuel:1960,
	key = "Zariski and Samuel 1960",
	author = "O. Zariski and P. Samuel",
	title = "Commutative Algebra",
	volume = "II",
	publisher = "D. Van Nostrand",
	year = 1960}

@book{Cassels:1957,
	key = "Cassels 1957",
	author = "J. W. S. Cassels",
	title = "An Introduction to Diophantine Approximation",
	publisher = CUP,
	year = 1957}

@book{Lang:1995,
	key = "Lang 1995",
	author = "S. Lang",
	title = "Introduction to {Diophantine} Approximations",
	publisher = SV,
	year = 1995}

@book{Koksma:1936,
	key = "Koksma 1936",
	author = "J. F. Koksma",
	title = "Diophantische Approximationen",
	publisher = "J. Springer",
	year = 1936}

@book{SchmidtW:1980,
	key = "W. Schmidt 1980",
	author = "W. M. Schmidt",
	title = "Diophantine Approximation",
	series = LNIM,
	volume = 785,
	year = 1980,
	publisher = SV}

@article{Selfridge:1960,
	key = "Selfridge 1960",
	author = "J. L. Selfridge",
	title = "Elementary Problem proposal {E 1408}",
	journal = AMM,
	volume = 67,
	year = 1960,
	pages = 290,
	note = "Solution, {\bf 67} (1960), 924-925"}

@article{Heath-Brown:1992,
	key = "Heath-Brown 1992",
	author = "D. R. Heath-Brown",
	title = "Zero-free regions for {Dirichlet} {$L$}-functions, and the
least prime in an arithmetic progression",
	journal = PLMS,
	volume = 64,
	year = 1992,
	pages = "265-338"}

@article{Schoenfeld:1976,
	key = "Schoenfeld 1976",
	author = "L. Schoenfeld",
	title = "Sharper bounds for the {Chebyshev} functions
$\theta(x)$ and $\psi(x)$. {II}",
	journal = MC,
	volume = 30,
	year = 1976,
	pages = "337-360",
	note = "Corrigenda in {\it Math. Comp.} {\bf 30} (1976), 900"}

@book{Legendre:1830,
	key = "Legendre 1830",
	author = "A.-M. Legendre",
	title = "Th\'eorie des Nombres",
	publisher = "Firmin Didot Fr\`eres",
	address = "Paris",
	year = 1830}