Yes, I do have particular books, classes, youtube videos, lectures, exercises, and other resources. It is highly dependent on your particular vocal tendencies, so your mileage will vary for all of them.

But just as i don't feel comfortable posting physical fitness advice due to the above issues, i don't feel inclined to share the techniques which worked well for me or have worked for my students without providing the support to ensure you gain maximum benefit from them. So I will simply state some intriguing names of techniques and remain available to answer questions from your own journey, instead of listing techniques which will be mostly useless and are easily disproven in the majority of circumstances.