Snyder, Donald L.
Random point processes
John Wiley & Sons, 1975
 Buku Teks
Keller, Herbert B.
Numerical methods for two-point boundary-value problems
"Waltham, Massachusetts Blaisdell Pub., 1968",
 Buku Teks
Swanson, Earl H.
The first conference of western archaeologists on problems of point typology
Pocatello, 1962.
 Buku Teks
Keller, Herbert B.
Numerical methods for two-point boundary-value problems
Blaisdell, 1968
 Buku Teks SO
Keller, Herbert B.
Numerical solution of two point boundary value problems
Society for Industrial and Applied Mathematics, 1990
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