Статьи - "Computers & Mathematics..." & &q

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Помогите, пож-та, найти две статьи:

9.

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http://dx.doi.org/10.1016/0898-1221(86)90437-2

Symmetry in chemical structures and reactions
Computers & Mathematics with Applications, Volume 12, Issues 3-4, Part 2, May-August 1986, Pages 999-1020
Alexandru T. Balaban

10.

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http://dx.doi.org/10.1016/0166-218X(88)90003-0

Alternating 6-cycles in perfect matchings of graphs representing condensed benzenoid hydrocarbons
Discrete Applied Mathematics, Volume 19, Issues 1-3, March 1988, Pages 5-16
Balaban Alexandru T.Ioan Tomescu

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