In the Russian language, in museum practice and art criticism under the attribution is commonly understood as the establishment (as defined), author of the work, time and place of its creation. A similar significance has this word in other languages, including French. When specialist attributed to the product without a signature or with an incorrect signature, it defines the author and is responsible for it, risking, at least, his professional reputation. Of course, as the French say, the risk of 0 does not exist, and errors, as in any other profession. Yes, and a professional from the professional is different, a more experienced, more talented than others. But in general, has not yet shown clear evidence to the contrary, the determining factor is a professional opinion, gave its opinion.
The fact that you think "international rules" is actually a sly terminology, as a routine auction houses (mainly Anglo-Saxon and not too long ago), intended to evade responsibility, as outlined above. With the same purpose, the definitions "of such a school", "entourage of a certain" etc. In other words, the aggressive commerce in their own interests trying to emasculate the content of the generally accepted term of art history. Unfortunately, not only here.
Conformal perception of works of art humanly understandable. I want to, get informed, to know at a glance, without distracting from the generally accepted number. Otherness spontaneously evokes a feeling of rejection. But the otherness otherness hatred. There are cases where enough is not very high quality photos to make a definite and final conclusion that the forum has repeatedly happened. However, you can remember and cite numerous examples of atypical works by artists both known and yet not very.
Atypical things are not the verdict of its authorship.
40 years ago, something prompted a French expert called H. Soutine portrait of the author of this unpretentious, and later E. Kovtun confirm this view. Yes, and actual examination did not reject the idea out of hand, and working, studying, exploring, in general, as it should be professionals.
We do not know the circumstances. Perhaps the first expert familiar with the history of this work, perhaps he had other arguments, but they had been. Of course, at all times there were not very unscrupulous people, but still 40 years ago, the world in the sense of professional integrity was different, as, indeed, and the system of public procurement and peer responsibilities in France.
The owner of a portrait showing his son M. Kikoina artist Yankel, who also spoke in favor of the expert version, but as portrayed called the landlord's daughter, where he lived Soutine.
Since they are neither the owner nor the seller of this portrait, on all issues concerned can forward directly to its owner.
A few words about the price. The picturesque quality of the portrait, the absence of the author's signature, size, the difference from the well-known examples, like you, uriart, Observation notice gave no reason for high prices. Nevertheless, it has some collector's interest as a curiosity associated with the works of famous artist. As takogogo and may in this forum.
In conclusion, I wish before a peremptory vehemence teenager to make certain judgments, assume that one person to whom they are intended may be informed about this issue as much as you, maybe he, like you, are interested in this topic, also goes to the exhibition , reads books, and try to kindly look into the fact that he says.
And you further discoveries in the field of art in your work.