[2] Z. SHMUELY:
Galois Connections: I. The Structure of Galois Connections. Technion Preprint Series No. MT-107, Technion-Israel Institute of Technology, Dept. of Math., Haifa, Israel.
MR 0376455
[3] Z. SHMUELY: Galois Connections: II. A "Tensor Product" of Partially Ordered Sets. Techninon Preprint Series No. MT-113,Technion-Israel Institute of Technology, Dept. of Math., Haifa, Israel.