Good question, vulcan.
Although who, among us, has access to a full set of scientific journals? Not the sort of things that public libraries would have shelf space for. Those of you within a reasonable commute of the British Library should consider yourselves privileged. Provincial University libraries would probably turn you away for lack of an ID card.
Newspapers are not above removing the crucial words "in mice/rats/primates" for the sake of an attention-grabbing headline.
In this case, the toxicity of the oxidation compounds has been long established (dozens or hundreds of research papers, which could take weeks for we amateurs to track down) and all this paper shows is the absolute and relative quantities produced by heating to 180°C.
//Coconut oil produced the lowest levels of the harmful chemicals//
Is that a byeword for "palm oil"?
If yes, then farewell Orang Utang; it was nice knowing you.
It could be amusing, at this point, to investigate who funded this research.