The studies mentioned (but not linked?): https://scholar.google.com/scholar?oi=bibs&hl=en&cluster=17981514188681742351 https://scholar.google.com/scholar?oi=bi

The studies mentioned (but not linked?): https://scholar.google.com/scholar?oi=bibs&hl=en&cluster=17981514188681742351 https://scholar.google.com/scholar?oi=bibs&hl=en&cluster=179... https://scholar.google.com/scholar?oi=bibs&hl=en&cluster=3846230660850991448 https://scholar.google.com/scholar?oi=bibs&hl=en&cluster=384...