molecular genetics - Is ovum + ovum fertilization possible for human?

In humans is it possible to fertilize a ovum with another ovum from the same female subject?

I already found some works in which the ovum is fertilized by a somatic cell (see e.g. this ), but I am looking for fertilization specifically by another ovum.

Around a year ago I found in the internet a Japanese (ongoing) study on this, but cannot locate it any more.

I would greatly appreciate any help.