http://citation.dbpedia.org/hash/6f3671f0260130bfcc4b638917f91d6314505b58ef0bb78d338c48ea01631d95

http://citation.dbpedia.org/hash/44d32a908778e2f1c06504e5be9dc10342a3fab8027c51e7fc13895b9340ad3b

http://citation.dbpedia.org/hash/fff1d1ab0f8ad492f6c5113d266a5c813ceb86e9e7da11f67aa97e8ef00a0c06

http://citation.dbpedia.org/hash/a03cb5ff07a0ad068df13a5fd06084366be58446272e412d817d559c75745001

http://citation.dbpedia.org/hash/ec356527d48b4caff4a5127389bdde32eb0e1743632a7163dd1a56802a374790

http://citation.dbpedia.org/hash/37f44fde3c00ba888ae281be2a709b172b05ae761294956d9eab6b80b7465e45

http://books.google.com/books?vid=ISBN8301052872

http://citation.dbpedia.org/hash/589c2c3001f2414e65a0d5c621f4883c3860b93c7ac0dade32df41c6517c005c

http://citation.dbpedia.org/hash/d3421594f07e02db0a3ed01d7eab424cde08dedc6b9aa3be9013b6db4983e446

http://citation.dbpedia.org/hash/1eca9415494e62727d8eb22a7e8471e9b117656456dee634108d731479126c74

http://citation.dbpedia.org/hash/a88b2322f9427d69d93d495d81303ed48c43213bf6ccae9053a4aaba5fd39f73

http://citation.dbpedia.org/hash/3bbef113d7529c02b33854a62324023fd0900227ed57a9955cc401fd0d4bc191

http://citation.dbpedia.org/hash/c2c2b06d1b724197cf7e3afafc78b8a1fb3fc95f2a75a32ce79566072e9dba23

http://citation.dbpedia.org/hash/fe93f0da43c13ffa9f5cae29e6230c69bab059cefed809cd524251e5c372c5fe

http://books.google.com/books?vid=ISBN83-01-05287-2

http://citation.dbpedia.org/hash/8c6e613f744f7a6a3557b5b9b0e92f26bdef6d413bed0784af157e1cf140bcc1

http://books.google.com/books?vid=ISBN83-01-14439-4

http://citation.dbpedia.org/hash/7a46d653c283ce927ded6fffbf0de78769340eb3c1413c3c5ba6ca872801ee57

http://citation.dbpedia.org/hash/704bc715bfee01096524dfa4c370ad58cd57c12fc081dbaadd990f76f2465a6f

http://citation.dbpedia.org/hash/464dacf484ffd185ac9caf450f44b904e7f73ee9b0dc4421b5ee14e5e9a3053e

http://citation.dbpedia.org/hash/3d90799fdaaa754e7648c87b3251099aab15cdfa9df64c7f4c330aab8d9884b9

http://citation.dbpedia.org/hash/af500646959f45149eb1a4a6e26ff2ae95417344299da3a48842e0f11eb54976

http://citation.dbpedia.org/hash/95a1ac1884af7877b217e35bfb6194515b7192525153cca3400f9e1a85c2fe0d

http://citation.dbpedia.org/hash/50dbf62ae81fccf5bb3c60e7384c567f3c9335fe0c378ed7aadfee46a9ba2a3b

http://citation.dbpedia.org/hash/407047329f6bf39d0ca60554996177396d05c0d1ff68124a92460acaa6738b6e

http://citation.dbpedia.org/hash/30d47624354bf49fa322d5b2ceabb3f556efd80b91541a576b40ccc680f656a1

http://citation.dbpedia.org/hash/1bc03ffe60df52aecfabb292b3f80f1e33672f0e887744ad2d8ee21e3b3378ca

http://citation.dbpedia.org/hash/e98eb7ab53f69456277766f0c7dfbff2792cd31d634cb6e79f86ca04f45daeaa

http://citation.dbpedia.org/hash/bb2562072d98822881b4deb9d429cf496fef8a89cf3db2f30999363a7bc60691

http://citation.dbpedia.org/hash/0648646febfa78bc3c06da3c5aea3ff0256775e46d9b04d828283148c3ce8a05