Important Notice

I am independent researcher unconnected to any institution. All the information on this website is provided for free.

However maintenance, research, and hiring servers costs a lot of money. So if you like the site and it is useful for you please consider to make a donation to keep it online.

All donations whatever ther amount, are welcome and help me to continue my work. Pay with your credit card, securely, via Paypal.

Important Notice

I am an independent researcher unconnected to any institution. All the information on this website is provided for free. However maintenance, research, and hiring servers costs a lot of money.

So if you like the site and it is useful for you please consider to make a donation to keep it online. All donations, no matter how small, are welcome and help me to continue my work.

Pay with your credit card, securely, via Paypal.