Almeida June Dalziel, Webster Terence Roy: Method of preserving monolayers of tissue culture cells, and tissue culture cells so preserved.. Wellcome Found, June 10, 1981: EP0030016-A2

A method of preserving fixed monolayers of tissue culture cells grown on a solid, inert support which comprises coating the cells with a water insoluble wax. Also provided are tissue culture cells preserved by this method.