TY  - GEN
AU  - Hamer, Jan
TI  - 1, 4 - cyclo additon reactins : the diels - alder reaction in heterocyclic synthesis
T2  - A series of monographs
U1  - 541.393 HAM 
CY  - Newyork, Academic press
KW  - 1.4-cyclo addition reactions/ 5 - membered cyclic sulfones/ trivalent phosphorans compounds
ER  -