Grimm's law and Verner's law

Wikipedia article: Verner's law
Wikipedia article Grimm's law
University of Calgary Grimm's law
Faculty of Furman Verner's law
Merriam Webster article on Verner's law
Faculty of Furman: Grimm's law
University of Berkeley Article on Grimm's law in pdf format
University of Michigan: Grimm's law
West Texas A&M university: Grimm's law
Britannica article on Grimm's law
Merriam Webster article on Grimm's law
West Texas A&M University: article on Grimm's law