@article{article177164af,
title   = {Some new sulfur and selenium substituted benzoquinone - cyclopentadiene diels - alder adducts: part ii. Monosubstituted adducts},
author = {Wladislaw, Blanka and Marzorati, Liliana and Di Vitta, Cláudio and Campos, I P A},
year = {1990},
journal   = {Phosphorus, Sulfur, and Silicon and the Related Elements}
}