Which artist is credited for creating drip art?

Which artist is credited for creating drip art?
That style of action painting was experimented with in the first half of the twentieth century by such artists as Francis Picabia, and Max Ernst, who employed drip painting in his works The Bewildered Planet, and Young Man Intrigued by the Flight of a Non-Euclidean Fly (1942).
Drip painting was however to find particular expression in the work of the mid-twentieth century artist Jackson Pollock. Pollock found drip painting to his liking; later using the technique almost exclusively, he would make use of such unconventional tools as sticks, hardened brushes and even basting syringes to create large and energetic abstract works.