Facile and Convenient Synthesis of 4,4′-(Arylmethylene)bis(1H-pyrazol-5-ols) by Electrocatalytic Tandem Knoevenagel-Michael Reaction - Elinson, Michail N; Dorofeev, Alexander S; Nasybullin, Ruslan F; Nikishin, Gennady I (Synthesis, 2008)