Please explain in greater detail why do you think that (i) the external link is not in line with WP:EL and (ii) the Hannan's book summary is not in contradiction with your edits. According to the summary Hannan demonstrates that "the diachronic development of the Teschen dialects is that of a "mixed" language". Your edits are constantly excluding this sourced view as they claim that the dialect is simply a dialect of Polish, nothing else. As a result of this, your edits are contrary to the Wikipedia:Neutral point of view - the article does not represent fairly and without bias all significant views. It would be good if you could read the Hannan's book. I will find the editor who first inserted the reference to the Hannan's book and ask him/her for his/her views if you do not trust me.