1. Riordan Arrays: A Primer;Barry,2016
2. Combinatorial Species and Tree-Like Structures;Bergeron,1998
3. Solution to Problem 85-16: a conjectured definite integral;Bouwkamp;SIAM Rev.,1986
4. Partially Ordered Rings and Semi-Algebraic Geometry;Brumfiel,1979
5. Enumeration of some labelled trees;Chauve,1999