The painting "Spring Fun", who is the author?

[Кирилл1974]

All the good days!
42.5h63sm size , x /m The frame of a pencil 51.g. On the back of the canvas : Spring Fun and a word not legible , perhaps the author's name .
 Picture without the restoration has a clear homogeneous time craquelure (see two photos on a bright searchlight clearance) . The signature in the lower right corner of VB48 , in cracks craquelure black paint does not, then the signature is applied to his education, which gives a chance pologayu that the signature is authentic.
Please help with the definition of authorship. Thank you all.