Useful Links
1. Walter Trump «Ultra Magic squares»
http://www.magic-squares.net/trump-ultra.htm
2. The best results of the competition “Pandiagonal magic squares of prime numbers”
http://trdb.org/Contest/PandiagonalMagicSquares/FinalReport
3. The article «Unconventional ultra magic squares»
http://www.klassikpoez.narod.ru/idnet.htm
4. Series of articles “Unconventional pandiagonal squares”
one of the articles cycle
http://www.natalimak1.narod.ru/pannetr1.htm
5. A. Chernov “Ultra magic squares 9th order of prime numbers”
http://alex-black.ru/article.php?content=120
6. The topic “Magic squares”
http://dxdy.ru/topic12959.html
7. The topic «Anti-magic squares»
http://dxdy.ru/topic58862.html
8. The topic “Diabolic magic squares of prime numbers”
http://dxdy.ru/topic73817.html
9. The topic «Ultra magic squares»
http://e-science.ru/groups/%D0%B8%D0%B4%D0%B5%D0%B0%D0%BB%D1%8C%D0%BD%D1%8B%D0%B5-%D0%BC%D0%B0%D0%B3%D0%B8%D1%87%D0%B5%D1%81%D0%BA%D0%B8%D0%B5-%D0%BA%D0%B2%D0%B0%D0%B4%D1%80%D0%B0%D1%82%D1%8B
10. «The constant for the smallest n X n associative magic square which consists of primes»
http://oeis.org/A188537