"you may be right but I haven't found anything in text books or the internet to say so "

I remember being ridiculed by someone who had read a 100 year old book and refused to accept modern advances on fluid dynamics and acoustics, because the original author had not mentioned what I said ... as far as the Internet, it's a bit like a lucky dip - if you want the latest advances, then Google is not always appropriate, you need appropriate sources, for many of which you may need financial membership.