Do your own google searches. It's all over the internet.
Undercapitalization is a common reason for startup failure. Maybe that has something to do with it being difficult to access capital?
Or more likely it's the other way around: It's hard for startups to get capital because their failure rate is so high. If they go to the trouble to create a realistic business plan, in most cases they give up the idea immediately, because most of them have bad ideas for a startup business.
You know, there is a simple way around this: You organize your business as a partnership, so every person working in the business is a partner. You don't need a bunch of capital if the business is scaleable. You make a profit in the first month and just keep on scaling it up gradually. You end up with an employee owned business. You can make it unequal shares, if you want to maintain control.